1 Unit for Human Reproduction, 1st Department of Obstetrics and Gynaecology, School of Medicine, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Ring Road, N. Efkarpia, 54629 Thessaloniki, Greece.
2 Department of Reproductive Medicine and Gynecological Endocrinology, University Hospital of Schleswig-Holstein, Campus Luebeck, Ratzeburger Allee 160, 23538 Lübeck, Germany.
3 Women's and Children's Health, UNSW Medicine, University of New South Wales, Royal Hospital for Women, Level 1, Barker Str, Randwick NSW 2031, Australia.