1. Department of Colorectal Surgery, Santa Rita Clinic, Vercelli, Italy
2. Department of Surgical and Medical Sciences, University “Magna Graecia” of Catanzaro, Catanzaro, Italy
3. Department of Surgical Science, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
4. Nuclear Medicine Department, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
5. Colorectal Surgical Unit, Department of Surgery, Infermi Hospital, Biella, Italy
6. Department of Surgery, Savigliano Hospital, Savigliano, Italy
7. Department of Surgery, Koelliker Hospital, Turin, Italy