[1] Osped C&G Mazzoni, Gen Surg Unit, ASUR Marche AV5 Via Iris Snc, I-63100 Ascoli Piceno, Italy
[2] Sacro Cuore Hosp, Gen Surg Unit, Negrar Di Valpolicella, VR, Italy
[3] Santa Croce & Carle Hosp, Dept Surg, Cuneo, Italy
[4] Marche Nord Hosp, Dept Surg, Pesaro, PU, Italy
[5] Marche Nord Hosp, Dept Surg, Fano, PU, Italy
[6] IRCCS G Pascale Fdn, Colorectal Surg Oncol, Natl Canc Inst, 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 della 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 & Spedali Civili Brescia, Gen Surg Unit 3, Brescia, Italy
[15] C Urbani Hosp, Dept Surg, Jesi, AN, Italy
[16] E Agnelli Hosp, Gen Surg Unit, Pinerolo, TO, Italy
[17] Policlin Casilino, Gen Surg Unit, Rome, Italy
[18] Policlin Campus BioMed, Geriatr Surg Unit, Rome, Italy
[19] Belcolle Hosp, Gen & Oncol Surg Unit, Viterbo, Italy
[20] Spedali Civili Brescia, Gen Surg Unit, Montichiari, BS, Italy
[21] Sacro Cuore Hosp, Gynecol Unit, Negrar Di Valpolicella, VR, Italy