1 Department of Obstetrics and Gynaecology, Magna Graecia University, viale Europa, 88100, Catanzaro, Italy.
2 Center of Fetal Cardiology, IRCCS Policlinico San Donato, Via Morandi 30, San Donato Milanese, 20097, Milan, Italy.
3 Division of Obstetrics and Prenatal Medicine, Department of Medicine and Surgery (DIMEC), Istituto di Ricovero e cura a carattere scientifico Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.
4 Department of Obstetrics and Gynaecology, University of Tuebingen, Calwerstrasse 7, 72076, Tübingen, Germany.
5 Department of Obstetrics and Gynaecology, Istituto di Ricovero e Cura a Carattere Scientifico San Raffaele Scientific Institute; and Vita-Salute San Raffaele University, Via Olgettina 60, 20132, Milan, Italy.
6 Department of Obstetrics and Gynaecology, Azienda ospedaliera di Cosenza SS Annunziata, Via Felice Migliori 1, Cosenza, Italy.
7 BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, University of Barcelona, and Centre for Biomedical Research On Rare Diseases (CIBER-ER), Sabino de Arana 1, 08028, Barcelona, Spain.
8 Department of Obstetrics and Gynaecology, Istituto di Ricovero e Cura a Carattere Scientifico San Raffaele Scientific Institute; and Vita-Salute San Raffaele University, Via Olgettina 60, 20132, Milan, Italy. cavoretto.paolo@hsr.it.