1. Division of Pediatric Surgery and Urology; Federico II University of Naples; Naples Italy
2. Division of Pediatric Surgery; CHU de Saint-Etienne; Saint-Etienne France
3. Division of Pediatric Surgery; Christus-Muguerza Hospital; Monterrey Mexico
4. Division of Pediatric Surgery; CHU de Limoges; Hopital de la Mère et de l'Enfant; Limoges France
5. Division of Pediatric Surgery; CHU Lenval; Nice France