1. Department of Surgical Science, University of Cagliari, Cagliari, Italy
2. Division of Gastrointestinal Surgery, San Raffaele Hospital, Milan, Italy
3. Department of Surgical, Oncological, and Gastroenterological Sciences, University of Padova, Padua, Italy
4. Division of General Surgery, E. Agnelli Hospital, Pinerolo, Italy
5. Department of General Surgery, Polytechnic University of Marche, Ancona, Italy
6. Oncologic Surgical Unit, Policlinico San Martino Genova, Genoa, Italy
7. Department of Health Sciences, Operative Unit of General Surgery, University of Catanzaro, Catanzaro, Italy
8. Department of Medical and Surgical Sciences, Operative Unit of General Surgery, University of Catanzaro, Catanzaro, Italy
9. Division of General Surgery 2, Fondazione Policlinico Universitario Agostino Gemelli, IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
10. Department of Surgical Oncology, CRO Aviano National Cancer Institute IRCCS, Aviano, Italy
11. Division of Radiotherapy, CRO Aviano National Cancer Institute IRCCS, Aviano, Italy
12. University of Torino, School of Medicine, Department of Oncology, Digestive Surgery and Surgical Oncology, San Luigi University Hospital, Orbassano, Torino, Italy
13. Colorectal Surgical Oncology, National Cancer Institute, IRCCS, G. Pascale Foundation, Napoli, Italy
14. Division of General Surgery, Civil Hospital of Lentini, Siracusa, Italy
15. Medical Oncology Unit, Department of Oncology, Ospedale Sant’Andrea, La Spezia, Italy