Morbidity of cardiac "non-disease" in school children.
D002648:Child; D006326:Heart Auscultation; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D009017:Morbidity; D010817:Physician-Patient Relations; D012213:Rheumatic Fever / Q000175:diagnosis