1. Gynecology and Obstetrics Unit IRCCS San Raffaele Scientific Institute Milan Italy
2. Department of Gynecology and Obstetrics Vita‐Salute San Raffaele University Milan Italy
3. Division of Obsterics and Prenatal Medicine Department of Medicine and Surgery (DIMEC), IRCCS Azienda Ospedaliero ‐ Universitaria di Bologna Bologna Italy