1. Department of Obstetrics and Gynaecology; Arnas Civico Hospital; Palermo Italy
2. Department of Obstetrics and Gynaecology, Division of Maternal-Fetal Medicine; New York University SOM; New York NY USA
3. Centre for Medical Education and Clinical Research (CEMIC); University Hospital; Buenos Aires Argentina
4. Department of Clinical Medicine, Faculty of Health Sciences; UiT-The Arctic University of Norway; Tromsø Norway