[1] Femicare VZW Clin Res Women, B-3300 Tienen, Belgium
[2] Hosp St Olav, Dept Gynecol, N-7010 Trondheim, Norway
[3] LETO Obstetrician Gynecol & Surg Ctr, Dept Ob Gyn, Athens 11525, Greece
[4] German Ctr Infect Gynecol & Obstet, D-42283 Wuppertal, Germany
[5] Univ Interior Beira, Dept OBGyn, P-6200 Covilha, Portugal
[6] CHU Nancy Univ Lorraine, Dept OB Gyn, F-54000 Nancy, France
[7] Tianjin Med Univ Gen Hosp, Dept OB Gyn, Tianjin 30000, Peoples R China
[8] Univ Antwerp Hosp, Dept Ob Gyn, B-2650 Ekeren, Belgium