Public health aspects of ophthalmic disease: introduction.
Sommer
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Johns Hopkins School of Hygiene and Public Health, Baltimore, Maryland 21205-2179, USA.
D001766:Blindness / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control*; D006233:Persons with Disabilities; D014943:Global Health; D006801:Humans; D011322:Primary Prevention; D011634:Public Health