1. Division of Pediatric Surgery, Regina Margherita Children's Hospital, Turin, Italy
2. Department of Pediatrics, Ospedale Infantile Regina Margherita, Turin, Piemonte, Italy
3. Department of Pediatric Gynaecology, Regina Margherita Children's Hospital, Turin, Piemonte, Italy
4. Department of Pediatric Surgery, Ospedale Infantile Regina Margherita, Turin, Piemonte, Italy
5. Department of Surgery and Transplantation Centre, Bambino Gesù Children's Hospital - Bambino Gesù Children's Hospital, Rome, Italy
6. University College London Institute of Child Health, London, United Kingdom
7. Department of Women's and Children's Health, Pediatric Surgery, Universita degli Studi di Padova Dipartimento di Medicina, Padova, Italy
8. Pediatric Radiology Unit, Regina Margherita Children's Hospital, Turin, Italy