1. Department of Obstetrics and Gynecology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon
2. Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
3. Department of Obstetrics and Gynaecology, Royal Free Hospital, London, UK
4. Perinatal and Gynecology Center, Seefeld Zurich/Clinic Hirslanden, Zurich, Switzerland
5. Obstetric Research-Feto Maternal Hematology Unit, University Hospital Zurich, Zurich, Switzerland
6. School of Women’s and Children’s Health, University of New South Wales, Royal Hospital for Women, Randwick, Sydney, Australia
7. Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon