Epidemiologic studies of diseases in which a necessary cause is known.
Weiss
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NS
Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle 98195.
D016022:Case-Control Studies; D015984:Causality; D004196:Disease Outbreaks; D004813:Epidemiology / Q000145:classification* / Q000458:organization & administration; D006801:Humans; D009937:Organizational Objectives