1. Fetal Medicine Unit, Lanesborough Wing, 4 Floor, St George's, University of London & St George's University Hospitals NHS Foundation Trust; Molecular and Clinical Sciences Research Institute, London; UK
2. Perinatal Pathology; Great Ormond Street Hospital; London UK
3. Eastern Virginia Medical School; Norfolk VA USA
4. Department of Clinical Science, Intervention and Technology, Division of Obstetrics and Gynecology, Karolinska Institute; Stockholm Sweden
5. Department of Clinical Medicine; UiT-The Arctic University of Norway; Tromsø Norway
6. University of Utah School of Medicine; Salt Lake City UT USA