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S C Kaufman
Biometry and Epidemiology Program, National Eye Institute, Bethesda, Maryland 20892.
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F L Ferris, 3rd
Biometry and Epidemiology Program, National Eye Institute, Bethesda, Maryland 20892.
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D G Seigel
Biometry and Epidemiology Program, National Eye Institute, Bethesda, Maryland 20892.
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M D Davis
Biometry and Epidemiology Program, National Eye Institute, Bethesda, Maryland 20892.
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D L DeMets
Biometry and Epidemiology Program, National Eye Institute, Bethesda, Maryland 20892.