1. Department of Obstetrics and Gynecology, Feto-Maternal Medicine Unit , Aminu Kano Teaching Hospital/Bayero University , Kano , Nigeria
2. Department of Obstetrics and Gynecology , Weill Medical College of Cornell University , New York, NY , USA
3. Center for Medical Ethics and Health Policy, Baylor College of Medicine , Houston, TX , USA
4. Center for Mother and Child, Philipps University , Marburg , Germany
5. Clara Angela Foundation , Berlin , Germany
6. Division of Pediatrics and Child Health , University of Leeds , Leeds , UK
7. Thomas Jefferson University, Alfred I. DuPont Hospital for Children , Wilmington, DE , USA
8. Obstetrics and Gynecology, Weill Medical College of Cornell University , New York, NY , USA
9. Department of Obstetrics and Gynecology, Prenatal and Preimplantation Genetic Diagnosis, Fetal Therapy, Ospedale Microcitemico , Cagliari , Italy
10. Department of Perinatology, Obstetrics and Gynecology , Istanbul University, Cerrahpasa Medical School , Istanbul , Turkey
11. Department of Obstetrics and Gynecology , I.M. Sechenov First Moscow State Medical University , Moscow , Russia
12. New York Presbyterian Hospital , 525 East 68 Street, M-724, Box 122 , New York, NY 10065 , USA