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Your query returned 2 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results.

1.
National Health and Nutrition Examination Survey I, 1971-1975: Near and Distant Vision (ICPSR 8062)
United States Department of Health and Human Services. National Center for Health Statistics
2.
National Health Examination Survey, Cycle I, 1959-1962: Vision Data (ICPSR 9202)
United States Department of Health and Human Services. National Center for Health Statistics

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