Chronic bowel disease in the black population of southern Africa--enigmas and challenges.
Department of Medicine, University of the Witwatersrand, Johannesburg.
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D044383:Black People; D004032:Diet; D015444:Exercise; D006801:Humans; D007410:Intestinal Diseases / Q000208:ethnology*; D013019:South Africa / Q000453:epidemiology; D014504:Urban Health