1. Unit of Fetal Medicine and Prenatal Diagnosis Institute for Maternal and Child Health—IRCCS “Burlo Garofolo” Trieste Italy
2. Clinical Epidemiology and Public Health Research Unit Institute for Maternal and Child Health—IRCCS "Burlo Garofolo" Trieste Italy
3. Imperial College London, Obstetrics and Gynecology Queen Charlotte's & Chelsea Hospital London London UK
4. Obstetrics and Gynecology Unit IRCCS Giannina Gaslini Institute Genoa Italy
5. Department of Medical, Surgical and Health Sciences University of Trieste Trieste Italy