1. Department of Urology, Sant’Andrea Hospital, “Sapienza” University, Via di Grottarossa 1035, Rome, 00189, Italy
2. Department of Urology, Radboud University Medical Center, Geert Grooteplein Zuid 10, Nijmegen 6525 GA, Netherlands
3. Department of Urology, Charles Nicolle University Hospital, University of Rouen, 1 rue de Germont, 76000 Rouen, France
4. Department of Urogynaecology, King’s College Hospital, Denmark Hill, London SE5 9RS, UK