title: Prevalence of rheumatic heart disease in Delhi school children.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007194:India; D012214:Rheumatic Heart Disease / Q000453:epidemiology* / Q000209:etiology; D012723:Sex