[Vitamin A avitaminosis: a colective nutritional problem in Chile].
D002677:Chile; D006801:Humans; D009748:Nutrition Disorders / Q000453:epidemiology*; D012189:Retrospective Studies; D014801:Vitamin A / Q000600:supply & distribution; D014802:Vitamin A Deficiency / Q000453:epidemiology*
D014801:Vitamin A
La hipovitaminosis A: un problema nutricional colectivo en Chile.