Epidemiological principles in nutrition.
D000293:Adolescent; D000368:Aged; D000818:Animals; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D003154:Community Medicine; D003906:Developing Countries; D004463:Ecology; D004812:Epidemiologic Methods; D005523:Food Supply; D006801:Humans; D009748:Nutrition Disorders / Q000453:epidemiology* / Q000209:etiology / Q000628:therapy; D009747:Nutritional Physiological Phenomena