1. Unit of Fetal Medicine and Prenatal Diagnosis, IRCCS Materno Infantile Burlo Garofolo, Trieste, Italy
2. Department of Obstetrics and Gynecology, Vittore Buzzi Children’s Hospital, Milano, Italy
3. Department of Obstetrics and Gynecology, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milano, Italy