Prevalences of bowing and knock-knee in South African schoolchildren.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000453:epidemiology*; D007719:Knee Joint; D008297:Male; D012279:Rickets / Q000453:epidemiology*; D012737:Sex Factors; D013019:South Africa