Gonorrhoea and the iceberg phenomenon.
D000293:Adolescent; D000328:Adult; D005260:Female; D006069:Gonorrhea / Q000453:epidemiology* / Q000517:prevention & control; D006266:Health Education; D006801:Humans; D007360:Intelligence; D008297:Male; D044469:Racial Groups; D012737:Sex Factors; D012923:Social Class; D014481:United States