1. Department of Obstetrics and Gynecology University of Chieti Chieti Italy
2. Division of Maternal and Fetal Medicine, Ospedale Cristo Re University of Rome Tor Vergata Rome Italy
3. Department of Obstetrics and Gynecology I.M. Sechenov First Moscow State Medical University Moscow Russia
4. Fetal Medicine Unit St George's University of London London UK
5. Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute St George's University of London London UK
6. Department of Obstetrics and Gynecology University of Foggia Foggia Italy
7. Department of Medical and Surgical Sciences University of Foggia Foggia Italy