2 University of Portsmouth, Portsmouth, UK. valeriocelentano@yahoo.it.
3 Department of Surgery and Cancer, Imperial College, London, UK. valeriocelentano@yahoo.it.
4 Department of Advanced Medical and Surgical Science, Universita' degli Studi della Campania Luigi Vanvitelli, Naples, Italy.
5 Surgery of the Alimentary Tract, Sant'Orsola Hospital, Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy.
6 Minimally Invasive & Gastro-Intestinal Surgical Unit, Department of Surgery, Policlinico Tor Vergata, Rome, Italy.
7 Department of Clinical Medicine and Surgery, Federico II University of Naples, Naples, Italy.
8 U.O.C. Chirurgia Generale 2 - Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy.
9 General Surgery Unit, Department of Biomedical and Clinical Sciences "L. Sacco", University of Milan, ASST Fatebenefratelli Sacco, Milan, Italy.
10 Division of General and HPB Surgery, Department of Surgery, ASST Rhodense - Rho Memorial Hospital, 20017, Rho, Milan, Italy.
11 IBD Unit, Careggi University Hospital, Florence, Italy.
12 University of Naples Federico II, Naples, Italy.
13 Santa Corona Hospital, Pietra Ligure, Italy.
14 Colon and Rectal Surgery Unit, University of Cagliari, Cagliari, Italy.
15 Friuli Occidentale Hospital, Pordenone, Italy.
16 Division of Colon and Rectal Surgery, Humanitas Clinical and Research Center IRCCS, Via Manzoni 56, 20089, Rozzano, Milano, Italy.
17 Department of Surgical Oncological and Gastroenterological Sciences University of Padova, Surgical Unit, Padova, Italy.
18 IRCCS "Sacro Cuore - Don Calabria", Negrar, Vr, Italy.
19 Department of Public Health, University of Naples Federico II, Naples, Italy.
20 Department of Surgery, Santa Croce e Carle Hospital, Cuneo, Italy.
21 Department of Surgery, "Pederzoli" Hospital, Peschiera del Garda, Verona, Italy.
22 Department of Medical and Surgical Sciences, University of Catanzaro, Catanzaro, Italy.
23 Department of Health sciences, University of Catanzaro, Catanzaro, Italy.
24 Department of Surgery, University Hospital "Santa Maria della Misericordia", Udine, Italy.
25 Unit 1, General Surgery, Luigi Sacco University Hospital, Milan, Italy.
26 Department of Surgical Sciences, Citta della Salute e della Scienza di Torino, Presidio Molinette, University Hospital, Turin, Italy.
27 Department of General Surgery, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
28 Division of General and Oncologic Surgery, Mauriziano Hospital, Turin, Italy.
29 San Salvatore Hospital. Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.
30 Fondazione IRCCS Policlinico San Matteo di Pavia, Università degli Studi di Pavia, Pavia, Italy.
31 Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090, Pieve Emanuele, Milano, Italy.