[1] Natl & Kapodistrian Univ Athens, Univ Hosp ATTIKON, Med Sch, Dept Obstet & Gynecol 3, Athens, Greece
[2] Natl & Kapodistrian Univ Athens, Alexandra Hosp, Med Sch, Dept Obstet & Gynecol 1, Athens, Greece
[3] Chania Gen Hosp St George, Dept Obstet & Gynecol, Mournies, Greece