1. Fetal Medicine Unit, Maternal and Child Health and Development Network, Department of Obstetrics and Gynecology, University Hospital 12 de Octubre, Complutense University of Madrid, Madrid, Spain
2. Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
3. Department of Obstetrics and Gynecology, Center for High Risk Pregnancy and Fetal Care, University of Chieti, Chieti, Italy
4. Servicio de Obstetricia y Ginecología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
5. Prenatal Medicine Unit, Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Mother, Child and Adult, University of Modena and Reggio Emilia, Modena, Italy
6. Università di Roma Tor Vergata, Division of Maternal Fetal Medicine, Ospedale Cristo Re, Rome, Italy
7. Department of Obstetrics and Gynecology, The First I.M. Sechenov Moscow State Medical University, Moscow, Russia
8. Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, University of Naples Federico II, Naples, Italy
9. Department of Medical and Surgical Sciences, Institute of Obstetrics and Gynaecology, University of Foggia, Foggia, Italy
10. Department of Morphology, Surgery and Experimental Medicine, Institute of Obstetrics and Gynaecology, University of Ferrara, Ferrara, Italy