1. Fetal Medicine Unit Di Venere and Sarcone Hospitals Bari Italy
2. Maternal Infant Department SC Obstetrics and Gynecology, ASST Grande Ospedale Metropolitano Niguarda Milan Italy
3. Department of Clinical Science and Community Health University of Milan Milan Italy
4. Fetal Medicine and Surgery Service Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico Milan Italy