[1] Democritus Univ Thrace, Dept Obstet & Gynecol, Alexandroupolis 68100, Greece
[2] Natl & Kapodistrian Univ Athens, Med Sch, Dept Lab Expt Surg & Surg Res, Athens 11527, Greece
[3] Laikon Gen Hosp, Renal Transplantat Unit, Athens 11527, Greece
[4] Sotiria Hosp, Dept Surg, Athens 11527, Greece
[5] Univ Hosp Alexandra, Neonatal Dept, Athens 11528, Greece
[6] Natl & Kapodistrian Univ Athens, Dept Obstet & Gynecol, Athens 11528, Greece
[7] Rea Matern Hosp, Dept Obstet & Gynecol, Athens 17564, Greece