1. Department of Obstetrics and GynecologyUniversity of Chieti Chieti Italy
2. Fetal Medicine UnitSaint George's Hospital London UK
3. Department of Maternal and Fetal Medicine, Ospedale Cristo ReUniversity of Rome Tor Vergata Rome Italy
4. Department of Obstetrics and GynecologyThe First I.M. Sechenov Moscow State Medical University Moscow Russia
5. Department of Clinical and Community Sciences, University of Milan, and Department of Woman Child and NeonateFondazione IRCCS Cà Granda Ospedale Maggiore Policlinico Milan Italy
6. Department of Medical and Surgical Sciences, Institute of Obstetrics and GynecologyUniversity of Foggia Foggia Italy