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US5223398A
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Method for screening cells or formed bodies for enumeration of populations expressing selected characteristics
Assignee: Beckman Coulter Inc
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Filing: 1990-09-20
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Granted: 1993-06-29
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Expires: 2010-09-20
Abstract
Abstract A method and apparatus for automatically and rapidly, retrieving, counting and/or analyzing at least one selected white blood cell population and/or subset thereof of a whole blood sample or portion thereof. A volume of a biological sample containing the white blood cells is prepared and at least one reactant specific or preferential at least to some selected biological cells is introduced thereto and rapidly mixed for a short period of time. The opacity and/or volume parameter of the cells can be modified and the mixture is then counted and analyzed in one or more steps to obtain the desired white blood cell population analysis. The biological sample can be a whole blood sample and the reactant can include or be a lyse or a monoclonal antibody bound to microspheres, which will bind to specific ones of the cells or a combination of lyse and microspheres with antibody bound thereto. The microspheres can be magnetic and the bound cells can be magnetically removed for retrieving and analyzing the remaining blood cell population.
Inventors
- 👤 Kenneth H. Kortright
- 👤 Wallace H. Coulter
- 👤 Carlos Rodriguez
- 👤 Thomas Russell
- 👤 Ronald Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:46
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/5005; G01N33/5094; G01N33/53; G01N33/5302; G01N33/543; G01N33/54313; G01N33/54326; G01N33/569; G01N33/56966; G01N33/56972; G01N15/00; G01N15/10; G01N15/1031; G01N15/12; G01N15/14; G01N2015/1019; G01N2015/1024; G01N2015/1028; G01N35/00; G01N35/0098; Y; Y10; Y10S; Y10S436/00; Y10S436/807; Y10S436/808
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
196 words
A method of obtaining a not otherwise obtainable multi-part white blood cell population differential from a whole blood sample having at least a red blood cell population and white blood cell populations therein for identification and/or enumeration and/or study, comprising: removing said red blood cell population from said sample without adversely affecting relevant qualities and/or quantities of said white blood cell populations; electronically sensing and counting at least said white blood cell populations of granulocytes, monocytes and lymphocytes with at least two different electronic parameters to provide a total white blood cell population count; removing or shifting the neutrophil population contribution from said white blood cell populations by providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population and in so doing allowing for the electronic sensing of eosinophils and basophils; electronically sensing and counting at least said remaining white blood cell populations of monocytes, lymphocytes, eosinophils and basophils with at least two different electronic parameters; and comparing said counts to derive a count of said white blood cell population of neutrophils and thereby obtaining at least a five-part white blood cell differential.
Claim 2
Independent Claim
196 words
A method of obtaining a not otherwise obtainable multi-part white blood cell population differential from a whole blood sample having at least a red blood cell population and white blood cell populations therein for identification and/or enumeration and/or study, comprising: removing said red blood cell population from said sample without adversely affecting relevant qualities and/or quantities of said white blood cell populations; electronically sensing and counting at least said white blood cell populations of granulocytes, monocytes and lymphocytes with at least two different electronic parameters to provide a total white blood cell population count; removing or shifting the neutrophil population contribution from said white blood cell populations by providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population and in so doing allowing for the electronic sensing of eosinophils and basophils; electronically sensing and counting at least said remaining white blood cell populations of monocytes, lymphocytes, eosinophils and basophils with at least two different electronic parameters; and comparing said counts to derive a count of said white blood cell population of neutrophils and thereby obtaining at least a five-part white blood cell differential.
Claim 3
Dependent Claim
60 words
The method as defined in claim 1 wherein removal of said red blood cell population includes providing microspheres having a red blood cell specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bind to said red blood cell population; and removing said microspheres with said bound red blood cells from said whole blood sample.
Claim 4
Dependent Claim
44 words
The method as defined in claim 2 including providing magnetic microspheres and a magnetic field and removing said red blood cells from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 5
Dependent Claim
31 words
The method as defined in claim 2 including mixing said microspheres with said whole blood sample to bind said red blood cell population to said microspheres in less than sixty seconds.
Claim 6
Dependent Claim
94 words
The method as defined in claim 1 wherein removing said red blood cell population includes providing microspheres having a red blood cell specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bind to said red blood cell population and providing a red blood cell lyse with said microspheres to eliminate a portion of said red blood cell population to decrease the number of microspheres necessary to remove said red blood cell population; and removing said microspheres with said red blood cells bound thereto from said whole blood sample.
Claim 7
Dependent Claim
44 words
The method as defined in claim 5 including providing magnetic microspheres and a magnetic field and removing said red blood cells from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 8
Dependent Claim
37 words
The method as defined in claim 5 including mixing said microspheres with said whole blood sample to bind said red blood cell population to said microspheres in less than sixty seconds and to provide said lysing action.
Claim 9
Dependent Claim
29 words
The method as defined in claim 1 wherein removing said red blood cell population includes providing a red blood cell lyse to substantially eliminate said red blood cell population.
Claim 10
Dependent Claim
43 words
The method as defined in claim 1 including providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population to shift at least one sensed electronic characteristic of said neutrophil population.
Claim 11
Dependent Claim
44 words
The method as defined in claim 1 including providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population; and removing said microspheres with said neutrophil population bound thereto from said sample.
Claim 12
Dependent Claim
43 words
The method as defined in claim 10 including providing magnetic microspheres and a magnetic field and removing said neutrophil population from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 13
Dependent Claim
27 words
The method as defined in claim 10 including mixing said microspheres with said sample to bind said neutrophil population to said microspheres in less than sixty seconds.
Claim 14
Dependent Claim
21 words
The method as defined in claim 1 including said two electronic parameters being a low frequency and a high frequency signal.
Claim 15
Independent Claim
243 words
A method of obtaining a not otherwise obtainable multi-part white blood cell population differential from a whole blood sample having at least a red blood cell population and white blood cell populations therein for identification and/or enumeration and/or study, comprising: removing said red blood cell population from a first portion of said sample without adversely affecting the relevant qualities and/or quantities of said white blood cell populations; electronically sensing and counting at least said white blood cell populations of granulocytes, monocytes and lymphocytes in said first portion with at least two different electronic parameters to provide a total white blood cell population count; removing said red blood cell population from a second portion of said sample; removing or shifting the neutrophil population contribution from said white blood cell populations without adversely affecting the relevant qualities and/or quantities of said remaining white blood cell populations by providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population and in so doing allowing for the electronic sensing of eosinophils and basophils; electronically sensing and counting at least said remaining white blood cell populations of monocytes, lymphocytes, eosinophils and basophils in said second portion with at least two different electronic parameters; and comparing said counts from said first and second portions to derive a count of said white blood cell population of neutrophils and thereby obtaining at least a five-part white blood cell differential.
Claim 16
Independent Claim
243 words
A method of obtaining a not otherwise obtainable multi-part white blood cell population differential from a whole blood sample having at least a red blood cell population and white blood cell populations therein for identification and/or enumeration and/or study, comprising: removing said red blood cell population from a first portion of said sample without adversely affecting the relevant qualities and/or quantities of said white blood cell populations; electronically sensing and counting at least said white blood cell populations of granulocytes, monocytes and lymphocytes in said first portion with at least two different electronic parameters to provide a total white blood cell population count; removing said red blood cell population from a second portion of said sample; removing or shifting the neutrophil population contribution from said white blood cell populations without adversely affecting the relevant qualities and/or quantities of said remaining white blood cell populations by providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population and in so doing allowing for the electronic sensing of eosinophils and basophils; electronically sensing and counting at least said remaining white blood cell populations of monocytes, lymphocytes, eosinophils and basophils in said second portion with at least two different electronic parameters; and comparing said counts from said first and second portions to derive a count of said white blood cell population of neutrophils and thereby obtaining at least a five-part white blood cell differential.
Claim 17
Dependent Claim
67 words
The method as defined in claim 14 wherein removing said red blood cell population from at least one of said portions including providing microspheres having a red blood cell specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bid to said red blood cell population; and removing said microspheres with said red blood cells bound thereto from said whole blood sample.
Claim 18
Dependent Claim
44 words
The method as defined in claim 15 including providing magnetic microspheres and a magnetic field and removing said red blood cells from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 19
Dependent Claim
31 words
The method as defined in claim 15 including mixing said microspheres with said whole blood sample to bind said red blood cell population to said microspheres in less than sixty seconds.
Claim 20
Dependent Claim
101 words
The method as defined in claim 14 wherein removing said red blood cell population from at least one of said portions includes providing microspheres having a red blood cell specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bind to said red blood cell population and providing a red blood cell lyse with said microspheres to eliminate a portion of said red blood cell population to decrease the number of microspheres necessary to remove said red blood cell population; and removing said microspheres with said red blood cells bound thereto from said whole blood sample.
Claim 21
Dependent Claim
44 words
The method as defined in claim 18 including providing magnetic microspheres and a magnetic field and removing said red blood cells from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 22
Dependent Claim
38 words
The method as defined in claim 18 including mixing said microspheres with said whole blood sample portion to bind said red blood cell population to said microspheres in less than sixty seconds and to provide said lysing action.
Claim 23
Dependent Claim
36 words
The method as defined in claim 14 wherein removing said red blood cell population from at least one of said portions including providing a red blood cell lyse to substantially eliminate said red blood cell population.
Claim 24
Dependent Claim
44 words
The method as defined in claim 14 including providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bind to said neutrophil population to shift at least one electronic characteristic of said neutrophil population.
Claim 25
Dependent Claim
46 words
The method as defined in claim 14 including providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bind to said neutrophil population; and removing said microspheres with said neutrophil population bound thereto from said sample.
Claim 26
Dependent Claim
43 words
The method as defined in claim 23 including providing magnetic microspheres and a magnetic field and removing said neutrophil population from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 27
Dependent Claim
29 words
The method as defined in claim 23 including mixing said microspheres with said whole blood sample to bind said neutrophil population to said microspheres in less than sixty seconds.
Claim 28
Dependent Claim
21 words
The method as defined in claim 14 including said two electronic parameters being a low frequency and a high frequency signal.
Claim 29
Independent Claim
172 words
A method of obtaining a not otherwise obtainable multi-part white blood cell population differential from a whole blood sample having at least a red blood cell population and white blood cell populations therein for identification and/or enumeration and/or study, comprising: removing said red blood cell population from said sample without adversely affecting relevant qualities and/or quantities of said white blood cell populations; shifting the neutrophil population electronic sensing characteristic contribution with respect to the other white blood cell populations by providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population to shift at least one electronic characteristic of said neutrophil population, said microspheres being substantially smaller than said cells, and in so doing allowing for the electronic sensing of eosinophils and basophils; and electronically sensing and counting at least said white blood cell populations of monocytes, lymphocytes, neutrophils, eosinophils and basophils with at least two different electronic parameters and thereby obtaining at least a five-part white blood cell differential.
Claim 30
Independent Claim
172 words
A method of obtaining a not otherwise obtainable multi-part white blood cell population differential from a whole blood sample having at least a red blood cell population and white blood cell populations therein for identification and/or enumeration and/or study, comprising: removing said red blood cell population from said sample without adversely affecting relevant qualities and/or quantities of said white blood cell populations; shifting the neutrophil population electronic sensing characteristic contribution with respect to the other white blood cell populations by providing microspheres having a neutrophil specific monoclonal antibody bonded thereto and mixing said microspheres with said sample to bind to said neutrophil population to shift at least one electronic characteristic of said neutrophil population, said microspheres being substantially smaller than said cells, and in so doing allowing for the electronic sensing of eosinophils and basophils; and electronically sensing and counting at least said white blood cell populations of monocytes, lymphocytes, neutrophils, eosinophils and basophils with at least two different electronic parameters and thereby obtaining at least a five-part white blood cell differential.
Claim 31
Dependent Claim
60 words
The method as defined in claim 27 wherein removing said red blood cell population includes providing microspheres having a red blood cell specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bind to said red blood cell population; and removing said microspheres with said red blood cells bound thereto from said whole blood sample.
Claim 32
Dependent Claim
44 words
The method as defined in claim 28 including providing magnetic microspheres and a magnetic field and removing said red blood cells from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 33
Dependent Claim
31 words
The method as defined in claim 28 including mixing said microspheres with said whole blood sample to bind said red blood cell population to said microspheres in less than sixty seconds.
Claim 34
Dependent Claim
94 words
The method as defined in claim 27 wherein removing said red blood cell population including providing microspheres having a red blood cell specific monoclonal antibody bonded thereto and mixing said microspheres with said whole blood sample to bind to said red blood cell population and providing a red blood cell lyse with said microspheres to eliminate a portion of said red blood cell population to decrease the number of microspheres necessary to remove said red blood cell population; and removing said microspheres with said red blood cells bound thereto from said whole blood sample.
Claim 35
Dependent Claim
44 words
The method as defined in claim 31 including providing magnetic microspheres and a magnetic field and removing said red blood cells from said whole blood sample by removing the remainder of said whole blood sample while attracting said magnetic microspheres within said magnetic field.
Claim 36
Dependent Claim
37 words
The method as defined in claim 31 including mixing said microspheres with said whole blood sample to bind said red blood cell population to said microspheres in less than sixty seconds and to provide said lysing action.
Claim 37
Dependent Claim
29 words
The method as defined in claim 27 wherein removing said red blood cell population includes providing a red blood cell lyse to substantially eliminate said red blood cell population.
Claim 38
Dependent Claim
27 words
The method as defined in claim 27 including mixing said microspheres with said sample to bind said neutrophil population to said microspheres in less than sixty seconds.
Claim 39
Dependent Claim
21 words
The method as defined in claim 27 including said two electronic parameters being a low frequency and a high frequency signal.
Claim 40
Independent Claim
164 words
A method of obtaining at least one white blood cell population analysis not otherwise obtainable for identification and/or enumeration and/or study from a whole blood sample having at least a red blood cell population and white blood cell populations therein, at least one of said white blood cell populations further having at least two subsets, comprising: removing said red blood cell population from said sample without significantly adversely affecting relevant qualities and/or quantities of said white blood cell populations; removing or shifting at least one white blood cell population subset contribution from a selected specific white blood cell population by binding microspheres having a monoclonal antibody bonded thereto specific to said white blood cell population subset to said white blood cell population subset; and electronically sensing and analyzing said removed or shifted white blood cell population subset and said selected white blood cell population with at least two different electronic parameters to determine at least two characteristic of said selected white blood cell population.
Claim 41
Independent Claim
164 words
A method of obtaining at least one white blood cell population analysis not otherwise obtainable for identification and/or enumeration and/or study from a whole blood sample having at least a red blood cell population and white blood cell populations therein, at least one of said white blood cell populations further having at least two subsets, comprising: removing said red blood cell population from said sample without significantly adversely affecting relevant qualities and/or quantities of said white blood cell populations; removing or shifting at least one white blood cell population subset contribution from a selected specific white blood cell population by binding microspheres having a monoclonal antibody bonded thereto specific to said white blood cell population subset to said white blood cell population subset; and electronically sensing and analyzing said removed or shifted white blood cell population subset and said selected white blood cell population with at least two different electronic parameters to determine at least two characteristic of said selected white blood cell population.
Claim 42
Dependent Claim
21 words
The method as defined in claim 37 including said two electronic parameters being a low frequency and a high frequency signal.
Claim 43
Independent Claim
201 words
A method of obtaining at least one white blood cell population or population subset analysis not otherwise obtainable for identification and/or enumeration and/or study from a whole blood sample having at least white blood cell populations therein including at lest one white blood cell population subset, comprising: electronically sensing and counting with at least two different electronic parameters at least the white blood cell populations and subsets thereof to form a first total count; removing at least one of the white blood cell populations or a subset thereof by binding microspheres having a monoclonal antibody bonded thereto specific to at least one of said white blood cell populations or subset thereof to at least one of said white blood cell populations or a subset thereof; electronically sensing and counting with at least two different electronic parameters at least the remaining white blood cell populations without the removed population or subset to form a second count; and comparing said counts to obtain or derive at least one of (a) the remaining white blood cell populations without the removed population or subset, (b) the removed white blood cell population or subset population, or (c) both the remaining and removed white blood cell populations.
Claim 44
Independent Claim
201 words
A method of obtaining at least one white blood cell population or population subset analysis not otherwise obtainable for identification and/or enumeration and/or study from a whole blood sample having at least white blood cell populations therein including at lest one white blood cell population subset, comprising: electronically sensing and counting with at least two different electronic parameters at least the white blood cell populations and subsets thereof to form a first total count; removing at least one of the white blood cell populations or a subset thereof by binding microspheres having a monoclonal antibody bonded thereto specific to at least one of said white blood cell populations or subset thereof to at least one of said white blood cell populations or a subset thereof; electronically sensing and counting with at least two different electronic parameters at least the remaining white blood cell populations without the removed population or subset to form a second count; and comparing said counts to obtain or derive at least one of (a) the remaining white blood cell populations without the removed population or subset, (b) the removed white blood cell population or subset population, or (c) both the remaining and removed white blood cell populations.
Claim 45
Dependent Claim
92 words
The method as defined in claim 39 wherein removing at least one of the white blood cell populations or a subset thereof includes providing microspheres having a monoclonal antibody specific to at least one of the white blood cell populations or a subset thereof bonded thereto and mixing said microspheres with said sample to bind to at least one of the white blood cell populations or a subset thereof; and removing said microspheres with at least one of the white blood cell populations or a subset thereof bound thereto from said sample.
Claim 46
Dependent Claim
50 words
The method as defined in claim 40 including providing magnetic microspheres and a magnetic field and removing said at least one of the white blood cell populations or a subset thereof from said sample by removing the remainder of the same while attracting said magnetic microspheres within said magnetic field.
Claim 47
Dependent Claim
12 words
The method as defined in claim 39 including removing the neutrophil population.
Claim 48
Dependent Claim
40 words
The method as defined in claim 39 including sequentially utilizing one portion of the sample to form said first count, remove said at least one of the white blood cell populations or a subset thereof and form said second count.
Claim 49
Dependent Claim
49 words
The method as defined in claim 39 including utilizing a first portion of the sample to form said first count and utilizing a second portion of the sample to remove said at least one of the white blood cell populations or a subset thereof and form said second count.
Claim 50
Dependent Claim
21 words
The method as defined in claim 39 including said two electronic parameters being a low frequency and a high frequency signal.
Claim 51
Independent Claim
228 words
A method of obtaining at least one white blood cell population or population subset analysis not otherwise obtainable for identification and/or enumeration and/or study from a whole blood sample having at least white blood cell populations therein including at least one white blood cell population subset, comprising: electronically sensing and counting at least the white blood cell populations and subsets thereof with at least two different electronic parameters to form a first total count; shifting at least one of the white blood cell populations or a subset thereof by binding microspheres having a monoclonal antibody bonded thereto specific to at least one of said white blood cell populations or subset thereof to at least one of said white blood cell populations or a subset thereof, said microspheres being substantially smaller than said cells; electronically sensing and counting with at least two different electronic parameters at least one of (a) the remaining white blood cell populations without the shifted population or subset, (b) the shifted white blood cell population or subset population, or (c) both the remaining and shifted white blood cell populations; and comparing said counts to obtain or derive at least one of (a) the remaining white blood cell populations without the shifted population or subset, (b) the shifted white blood cell population or subset population, or (c) both the remaining and shifted white blood cell populations.
Claim 52
Independent Claim
228 words
A method of obtaining at least one white blood cell population or population subset analysis not otherwise obtainable for identification and/or enumeration and/or study from a whole blood sample having at least white blood cell populations therein including at least one white blood cell population subset, comprising: electronically sensing and counting at least the white blood cell populations and subsets thereof with at least two different electronic parameters to form a first total count; shifting at least one of the white blood cell populations or a subset thereof by binding microspheres having a monoclonal antibody bonded thereto specific to at least one of said white blood cell populations or subset thereof to at least one of said white blood cell populations or a subset thereof, said microspheres being substantially smaller than said cells; electronically sensing and counting with at least two different electronic parameters at least one of (a) the remaining white blood cell populations without the shifted population or subset, (b) the shifted white blood cell population or subset population, or (c) both the remaining and shifted white blood cell populations; and comparing said counts to obtain or derive at least one of (a) the remaining white blood cell populations without the shifted population or subset, (b) the shifted white blood cell population or subset population, or (c) both the remaining and shifted white blood cell populations.
Claim 53
Dependent Claim
67 words
The method as defined in claim 46 wherein shifting at least one of the white blood cell populations or a subset thereof includes providing microspheres having a monoclonal antibody specific to at least one of the white blood cell populations or a subset thereof to shift at least one sensed electronic characteristic of said at least one of the white blood cell populations or a subset thereof.
Claim 54
Dependent Claim
12 words
The method as defined in claim 46 including shifting the neutrophil population.
Claim 55
Dependent Claim
40 words
The method as defined in claim 46 including sequentially utilizing one portion of the sample to form said first count, shift said at least one of the white blood cell populations or a subset thereof and form said second count.
Claim 56
Dependent Claim
49 words
The method as defined in claim 46 including utilizing a first portion of the sample to form said first count and utilizing a second portion of the sample to shift said at least one of the white blood cell populations or a subset thereof and form said second count.
Claim 57
Dependent Claim
21 words
The method as defined in claim 46 including said two electronic parameters being a low frequency and a high frequency signal.
Claim 58
Independent Claim
132 words
A method for determining at least one not otherwise obtainable white blood cell population or population subset in a whole blood sample or portion thereof for identification and/or enumeration and/or study, comprising: shifting at least one white blood cell population or subset population electronic sensing characteristic contribution with respect to other white blood cell populations or subset populations by binding microspheres having a monoclonal antibody bonded thereto specific to at least one of said white blood cell populations or subset thereof to at least one of said white blood cell populations or a subset thereof, said microspheres being substantially smaller than said cells; and electronically sensing and directly counting at least said shifted population with at least two different electronic parameters to obtain the contribution of said shifted population to said sample.
Claim 59
Independent Claim
132 words
A method for determining at least one not otherwise obtainable white blood cell population or population subset in a whole blood sample or portion thereof for identification and/or enumeration and/or study, comprising: shifting at least one white blood cell population or subset population electronic sensing characteristic contribution with respect to other white blood cell populations or subset populations by binding microspheres having a monoclonal antibody bonded thereto specific to at least one of said white blood cell populations or subset thereof to at least one of said white blood cell populations or a subset thereof, said microspheres being substantially smaller than said cells; and electronically sensing and directly counting at least said shifted population with at least two different electronic parameters to obtain the contribution of said shifted population to said sample.
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| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |