1 Department of Pediatric General Surgery, Regina Margherita Children's Hospital, University Hospital of Health and Science, Turin, Italy.
2 Department of Pediatric General Surgery, Regina Margherita Children's Hospital, University Hospital of Health and Science, Turin, Italy. Electronic address: riccardoguan@gmail.com.
3 Department of Surgery, Division of Colon and Rectal Surgery, Mayo Clinic, Jacksonville, FL, United States.
4 Easton Hospital, Department of Surgery, Easton, PA, United States.