1. Medical School, National and Kapodistrian University of Athens; Assisted Reproduction Unit, 3rd Department of Obstetrics and Gynaecology; Attikon University Hospital Rimini 1 Athens Chaidari Greece 12462
2. University of Aberdeen; Division of Applied Health Sciences; Aberdeen UK AB25 2ZL
3. University of Athens; 3rd Department of Obstetrics and Gynecology; 'Attikon' Hospital, Chaidari Athens Greece
4. Aberdeen Maternity Hospital; Obstetrics and Gynaecology; Foresterhill Aberdeen UK AB9 2ZD