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1992

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39. Did you have a blood transfusion at any time between 1977 and 1985?

1[] Yes
2[] No
9[] DK

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1991

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39. Did you have a blood transfusion at any time between 1977 and 1985?

1[] Yes
2[] No
9[] DK

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1990

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39. Did you have a blood transfusion at any time between 1977 and 1985?

1[] Yes
2[] No
9[] DK

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1989

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39. Did you have a blood transfusion at any time between 1977 and 1985?

1[] Yes
2[] No
9[] DK

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1988

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39. Did you have a blood transfusion at any time between 1977 and 1985?

1[] Yes
2[] No
9[] DK

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