[1] Natl & Kapodistrian Univ Athens, Gen Hosp Athens ALEXANDRA, Dept Obstet & Gynecol 1, Lourou & Vasilissis Sofias Ave, Athens 11528, Greece
[2] Laiko Gen Hosp Athens, Dept Obstet & Gynecol, Agiou Thoma 17, Athens 11527, Greece
[3] Univ Ioannina, Univ Gen Hosp Ioannina, Dept Obstet & Gynecol, Stavrou Niarchou Str, Ioannina 45500, Greece
[4] Gen Hosp Arta, Dept Obstet & Gynecol, Arta 47100, Greece
[5] Univ Hosp Larissa, Dept Embryol, Larisa 41110, Greece
[6] Gen Hosp Larisa, Dept Internal Med, Tsakalof 1, Larisa 41221, Greece
[7] Univ Gen Hosp Larissa, Dept Obstet & Gynecol, Larisa 41110, Greece
[8] Univ Gen Hosp Alexandroupolis, Dept Obstet & Gynecol, 6th Klm Alexandroupolis Makris, Alexandroupolis 68100, Greece
[9] Democritus Univ Thrace, Dept Obstet & Gynecol, 6th Km Alexandroupolis Makris, Alexandroupolis 68100, Greece
[10] Gen Hosp Xanthi, Dept Obstet & Gynecol, Neapoli 67100, Xanthi, Greece
[11] Univ Thessaly, Fac Med, Sch Hlth Sci, Dept Embryol, Larisa 41110, Greece