title: [Effects of various factors on the course of chronic rheumatic cardiac fever in children].
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008944:Mitral Valve Insufficiency / Q000150:complications; D012214:Rheumatic Heart Disease / Q000150:complications* / Q000517:prevention & control
vernacular_title: Wpływ niektórych czynników na przebieg przewlekłej reumatycznej choroby serca u dzieci