Congenital heart disease in Delhi school children.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006330:Heart Defects, Congenital / Q000453:epidemiology*; D006801:Humans; D007194:India; D008297:Male; D012744:Sex Ratio; D014505:Urban Population