title: Pelvic inflammatory disease. Research directions in the 1990s. Expert Committee on Pelvic Inflammatory Disease.
mesh_terms: D005260:Female; D006801:Humans; D000292:Pelvic Inflammatory Disease / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control; D012106:Research / Q000639:trends; D014481:United States / Q000453:epidemiology