[1] Univ Zaragoza, Dept Obstet & Gynecol, Fac Med, Zaragoza, Spain
[2] Rutgers Robert Wood Johnson Med Sch, Dept Obstet Gynecol & Reprod Sci, New Brunswick, NJ USA
[3] Hosp Lusiadas Porto, Porto, Portugal
[4] LAP, Unilabs, Porto, Portugal
[5] Ctr Hosp Sao Joao, Lower Genital Tract Unit, Porto, Portugal
[6] Rabin Med Ctr, Helen Schneider Hosp Women, FDepartment Obstet & Gynecol, Petah Tiqwa, Israel
[7] Univ Fed Fluminense Niteroi, Dept Obstet & Gynecol, Rio De Janeiro, Brazil
[8] Univ Iowa Hosp & Clin, Dept Obstet & Gynecol, Iowa City, IA 52242 USA