1. Obstetrics and Gynaecology Department, IRRCS San Raffaele Hospital and Vita-Salute San Raffaele University, Milan, Italy
2. Department of Obstetrics and Gynecology, Hampshire Hospitals NHS Foundation Trust, Basingstoke, UK
3. First Department of Obstetrics and Gynaecology, National and Kapodistrian University of Athens, ‘Alexandra’ General Hospital, Athens, Greece
4. Department of Urogynaecology, King’s College Hospital, London, UK
5. Department of Obstetrics and Gynecology, Del Ponte Hospital, University of Insubria, Varese, Italy