Survey Text

1991
1989
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1991
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b. Did you receive this treatment within the past 12 months?

1[] Yes (9c)
2[] No (10)
9[] DK (10)

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1989
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19a. Have you ever had laser or photocoagulation treatment for this problem?

1[] Yes
2[] No (20)
9[] DK (20)

b. Did you receive this treatment within the past 12 months?

1[] Yes
2[] No (20)
9[] DK (20)