1. Faculty of Medicine, Cairo University; Department of Obstetrics & Gynaecology; 8 Moustapha Hassanin St Manial Cairo Egypt
2. University of Auckland; Department of Obstetrics and Gynaecology; Private Bag 92019 Auckland New Zealand
3. The University of Auckland; Liggins Institute; Park Rd Grafton Auckland New Zealand 1142
4. University Medical Center; Department of Reproductive Medicine and Gynecology; Utrecht Netherlands