1. Division of Pediatric Surgery, Second University of Naples, Naples, Italy
2. Division of Pediatric Urology, “Casa Sollievo della Sofferenza” Hospital, IRCCS-San Giovanni Rotondo, Italy
3. Division Pediatric Surgery, “Santo Spirito” Hospital-G. D'Annunzio University-Chieti-Pescara, Pescara, Italy
4. Division of Pediatric Surgery, Hospital of Treviso-Padua University, Treviso, Italy
5. Department of Medical Sciences, Surgery and Neuroscience, Siena University, Siena, Italy
6. Unit of Pediatric Surgery, “G.B. Morgagni” Hospital, Catania, Italy
7. Division of Pediatric Urology, S. Anna Hospital, Torino, Italy
8. Division of Pediatric Surgery OO.RR., Hospital of Foggia, Foggia, Italy
9. Unit Pediatric Urology, “SS. Antonio e Biagio e Cesare Arrigo” Hospital, Alessandria, Italy
10. Division of Pediatric Surgery, San Bortolo Hospital, Vicenza, Italy
11. Division of Pediatric Urology, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy