title: Screening for asymptomatic Chlamydia trachomatis infection in male students by examination of first catch urine.
mesh_terms: D000328:Adult; D002690:Chlamydia Infections / Q000517:prevention & control / Q000652:urine*; D002692:Chlamydia trachomatis / Q000302:isolation & purification*; D006801:Humans; D007124:Immunoenzyme Techniques; D015994:Incidence; D008297:Male; D012725:Sexual Behavior