[1] Buckinghamshire Healthcare NHS Trust, Dept Genitourinary Med, Sexual Hlth Dept, Amersham, England
[2] Leeds Teaching Hosp NHS Trust, Dept Genitourinary Med, Leeds, England
[3] Univ Hosp Antwerp, Reg Hosp H Hart Tienen, Dept Obstet & Gynecol, Antwerp, Belgium
[4] Deutsch Zentrum Infekt Gynakol & Geburtshilfe, Wuppertal, Germany
[5] Statens Serum Inst, Res Unit Reprod Microbiol, Copenhagen, Denmark
[6] Buckinghamshire Healthcare NHS Trust, Wycombe Gen Hosp, Dept Genitourinary Med, Sexual Hlth Dept, Amersham HP7 0JD, England