1. Department of Obstetrics and Neonatology Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), AUSL Reggio Emilia Reggio Emilia Italy
2. Department of Obstetrics and Gynecology Carlo Poma Hospital, ASST Mantova Mantua Italy
3. Department of Obstetrics and Gynecology, Fondazione Policlinico Tor Vergata Tor Vergata University Rome Italy
4. Department of Obstetrics and Maternal–Fetal Medicine, UH Jackson Fetal Care University of Miami, Miller School of Medicine Miami FL USA
5. FETALMED Maternal–Fetal Diagnostic Center Fetal Imaging Unit Santiago Chile