Pelvic inflammatory disease: incidence and trends in private practice.
D000293:Adolescent; D000328:Adult; D002908:Chronic Disease; D005260:Female; D006069:Gonorrhea / Q000453:epidemiology; D006801:Humans; D008875:Middle Aged; D009819:Office Visits; D000292:Pelvic Inflammatory Disease / Q000453:epidemiology*; D011331:Private Practice; D014481:United States