[1] Natl & Kapodistrian Univ Athens, Aretaieio Hosp, Med Sch, Dept Obstet & Gynecol 2, Athens, Greece
[2] Aristotle Univ Thessaloniki, Med Sch, Dept Obstet & Gynaecol 1, Unit Reprod Endocrinol, Thessaloniki, Greece
[3] Natl & Kapodistrian Univ Athens, Aretaieio Hosp, Med Sch, Hormonal & Biochem Lab, Athens, Greece
[4] Natl & Kapodistrian Univ Athens, Alexandra Hosp, Med Sch, Dept Clin Therapeut, Athens, Greece