1 Department of Pediatric General Surgery, Regina Margherita Children's Hospital, AOU Città della Salute e della Scienza, Turin, Italy.
2 Department of Pediatric Surgery, Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy.
3 Department of Pediatric General Surgery, Regina Margherita Children's Hospital, AOU Città della Salute e della Scienza, Turin, Italy. Electronic address: riccardoguan@gmail.com.
4 Department of Radiology, Sant'Anna Hospital, AOU Città della Salute e della Scienza, Turin, Italy.