Difficulties in assessing the frequency of rheumatic heart disease in the general population.
D002648:Child; D004534:Egypt; D006326:Heart Auscultation; D006801:Humans; D012214:Rheumatic Heart Disease / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control; D013290:Streptococcal Infections / Q000453:epidemiology / Q000517:prevention & control