Beaver Dam Eye Study questioned.
Gray
J E
JE
D002386:Cataract / Q000453:epidemiology*; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D007908:Lens, Crystalline / Q000528:radiation effects*; D011829:Radiation Dosage; D011859:Radiography / Q000009:adverse effects*