1 Baylor College of Medicine/Texas Children's Hospital and Fetal Center, Houston, Texas, USA.
2 Fetal Medicine Unit, John Radcliffe Hospital, Oxford, UK.
3 Department of Women's and Reproductive Health, University of Oxford, Oxford, UK.
4 Department of Obstetrics & Gynecology, University of Utah Health, Salt Lake City, Utah, USA.
5 Maternal Fetal Medicine, Department of Obstetrics & Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada.
6 Department of Obstetrics and Gynecology, CEMIC University Hospital, Buenos Aires, Argentina.
7 Maternal-Fetal Medicine, Department of Obstetrics & Gynecology, Miller Children's & Women's Hospital/ Long Beach Memorial Medical Center, Long Beach, California, USA.