1 Department of Obstetrics and Gynecology, Center for Fetal Care and High-Risk Pregnancy, University of Chieti, Chieti, Italy (Drs Di Girolamo, Capannolo, Buca, Liberati, and D'Antonio).
2 Fetal Medicine Unit, St. George's Hospital, London, United Kingdom (Dr Khalil).
3 Department of Obstetrics and Gynaecology, Fondazione Policlinico Tor Vergata, Università degli Studi di Roma Tor Vergata, Rome, Italy (Dr Rizzo).
4 Department of Clinical Science, Intervention and Technology, Karolinska Institute and Center for Fetal Medicine, Karolinska University Hospital, Stockholm, Sweden (Dr Acharya); Women's Health and Perinatology Research Group, Department of Clinical Medicine, University of Tromsø - The Arctic University of Norway, Tromsø, Norway (Dr Acharya); Department of Obstetrics and Gynecology, University Hospital of North Norway, Tromsø, Norway (Dr Acharya).
5 Divisions of Maternal-Fetal Medicine and Clinical Research, Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO (Dr Odibo).
6 Department of Obstetrics and Gynecology, Center for Fetal Care and High-Risk Pregnancy, University of Chieti, Chieti, Italy (Drs Di Girolamo, Capannolo, Buca, Liberati, and D'Antonio). Electronic address: francesco.dantonio@unich.it.