[1] UOC Chirurg Gen, Ascoli Piceno, Italy
[2] Osped C & G Mazzoni, Gen Surg Unit, ASUR Marche AV5 Via Iris Snc, I-63100 Ascoli Piceno, Italy
[3] Sacro Cuore Hosp, Gen Surg Unit, Negrar, VR, Italy
[4] Santa Croce & Carle Hosp, Dept Surg, Cuneo, Italy
[5] Marche Nord Hosp, Dept Surg, Pesaro E Fano, PU, Italy
[6] G Pascale Fdn, IRCCS, Natl Canc Inst, Colorectal Surg Oncol, Naples, Italy
[7] Santo Stefano Hosp, Gen & Oncol Surg Unit, Prato, FI, Italy
[8] San Filippo Neri Hosp, Gen & Oncol Surg Unit, Rome, Italy
[9] Ceccarini Hosp, Gen Surg Unit, Riccione, RN, Italy
[10] Santa Chiara Hosp, Dept Surg, Trento, Italy
[11] Casa Sollievo Sofferenza Hosp, Abdominal Surg Unit, San Giovanni Rotondo, FG, Italy
[12] Natl Canc Ctr San Martino, Gen & Oncol Surg Unit, Genoa, Italy
[13] Regina Apostolorum Hosp, Gen Surg Unit, Albano Laziale, RM, Italy
[14] Univ Brescia, Gen Surg Unit 3, Brescia, Italy
[15] Spedali Civili Brescia, Brescia, Italy
[16] C Urbani Hosp, Dept Surg, Jesi, AN, Italy
[17] E Agnelli Hosp, Gen Surg Unit, Pinerolo, TO, Italy
[18] Policlin Casilino, Gen Surg Unit, Rome, Italy
[19] Policlin Campus BioMed, Geriatr Surg Unit, Rome, Italy
[20] Belcolle Hosp, Gen & Oncol Surg Unit, Viterbo, Italy
[21] Spedali Civili Brescia, Gen Surg Unit, Montichiari, BS, Italy
[22] Sacro Cuore Hosp, Gynecol Unit, Negrar, VR, Italy
[23] Santa Chiara Hosp, Dept Surg, Trento, Italy
[24] C & G Mazzoni Hospi, Clin Governance Unit, Ascoli Piceno, Italy