1. Division of Pediatric Surgery, Federico II University Hospital, Naples, Italy.
2. Division of Pediatric Surgery, Hôpital Necker Enfants Malades, Paris, France.
3. Division of Pediatric Surgery, CHU—Centre de Pédiatrie de Clocheville, Tours, France.
4. Division of Pediatric Urology, Meyer Children Hospital, Florence, Italy.
5. Division of Pediatric Surgery, Hôpital de la Mère et de l'Enfant, Limoges, France.
6. Division of Pediatric Surgery, Ospedale Regionale di Bellinzona e Valli, Bellinzona, Switzerland.
7. Division of Pediatric Urology, Regina Margherita Hospital, Turin, Italy.
8. Division of Pediatric Surgery, Val d'Hebron Maternity and Children's Hospital, Barcelona, Spain.
9. Division of Pediatric Surgery, Buzzi Children Hospital, Milan, Italy.
10. Division of Pediatric Surgery, Huderf Children's Hospital, Brussels, Belgium.
11. Division of Pediatric Surgery, Medical University of Padua, Padua, Italy.
12. Division of Pediatric Surgery, Medical University of Catania, Catania, Italy.
13. Division of Pediatric Urology, Bambin Gesù Children Hospital, Rome, Italy.
14. Division of Pediatric Surgery, San Bortolo Hospital, Vicenza, Italy.
15. Division of Pediatric Surgery, CHU Robert Debré, Paris, France.