Biochemical evaluation of the nutrition status of urban primary school children: vitamin-A status.
D000293:Adolescent; D001741:Black or African American; D000375:Aging; D044383:Black People; D002338:Carotenoids / Q000097:blood*; D002648:Child; D005007:Ethnology; D005260:Female; D006801:Humans; D008297:Male; D009749:Nutrition Surveys; D012723:Sex; D013019:South Africa; D014801:Vitamin A / Q000097:blood*; D014802:Vitamin A Deficiency / Q000453:epidemiology*; D044465:White People; D014985:Xerophthalmia / Q000209:etiology
D014801:Vitamin A; D002338:Carotenoids