1. Department of Clinical Sciences and Community Health, School of Medicine and Surgery, University of Milan, I‑20122 Milan, Italy
2. Department of Obstetrics and Gynecology, University of Perugia, S.M. Della Misericordia Hospital, I‑06156 Perugia, Italy
3. Department of Woman, Newborn and Child, Gynaecology Unit, ‘Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico’, I‑20122 Milan, Italy
4. Department of Biomedical Sciences for Health, University of Milan, I‑20133 Milan, Italy