Adolescents and sexually transmitted diseases: an expanding problem. Introduction.
D000293:Adolescent; D000294:Adolescent Behavior; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000453:epidemiology* / Q000635:transmission; D014481:United States