title: Non-gonococcal urethritis in males--a preliminary study.
mesh_terms: D002690:Chlamydia Infections; D002692:Chlamydia trachomatis; D006801:Humans; D008297:Male; D014245:Trichomonas Infections; D014246:Trichomonas vaginalis; D014526:Urethritis / Q000209:etiology* / Q000382:microbiology