[1] Campus BioMed Univ Hosp, Colorectal Surg Unit, Rome, Italy
[2] Univ & Spedali Civili, Gen Surg Unit 3, Brescia, Italy
[3] Moscati Hosp, Gen & Oncol Surg Unit, Avellino, Italy
[4] Natl Canc Ctr San Martino, Gen & Oncol Surg Unit, Genoa, Italy
[5] San Giovanni di Dio Hosp, Gen Surg Unit, Crotone, Italy
[6] Univ Hosp, Gen Surg Unit, Laquila, Italy
[7] Tor Vergata Univ Hosp, Gen Surg Unit, Rome, Italy
[8] IRCCS G Pascale Fdn, Colorectal Surg Oncol Unit, Naples, Italy
[9] Policlin Casilino, Gen Surg Unit, Rome, Italy
[10] Univ Hosp, Gen Surg Unit, Ferrara, Italy
[11] Univ Hosp, Gen Surg Unit, Trieste, Italy
[12] Belcolle Hosp, Gen Surg Unit, Viterbo, Italy
[13] Ceccarini Hosp, Gen Surg Unit, Riccione, RN, Italy
[14] ASST Nord Hosp, Gen Surg Unit, Sesto San Giovanni, MI, Italy
[15] Infermi Hosp, Gen Surg Unit, Rimini, Italy
[16] Marche Nord Hosp, Gen Surg Unit, Pesaro Fano, PU, Italy
[17] ASL Napoli2 Hosp, Gen Surg Unit, Pozzuoli, NA, Italy
[18] AULSS2 Hosp, Gen Surg Unit, Conegliano, TV, Italy
[19] Santa Chiara Hosp, Gen Surg Unit, Trento, Italy
[20] C Urbani Hosp, Gen Surg Unit, Jesi, AN, Italy
[21] Regina Apostolorum Hosp, Gen Surg Unit, Albano Laziale, RM, Italy
[22] E Agnelli Hosp, Gen Surg Unit, Pinerolo, TO, Italy
[23] ASUR AV3 Hosp, Gen Surg Unit, Macerata, Italy
[24] IRCCS Ist Tumori Giovanni Paolo II, Surg Oncol Unit, Bari, Italy
[25] San Filippo Neri Hosp, Gen & Oncol Surg Unit, Rome, Italy
[26] Santa Croce & Carle Hosp, Gen Surg Unit, Cuneo, Italy
[27] Univ Hosp, Gen Surg Unit Upper GI, Verona, Italy
[28] Catholic Univ Hosp, Gen Surg Unit, Rome, Italy
[29] Univ Hosp, Gen Surg Unit Lower GI, Verona, Italy
[30] IRCCS Casa Sollievo Sofferenza, Gen Surg Unit, San Giovanni Rotondo, FG, Italy
[31] Santa Maria Annunziata Hosp, Gen Surg Unit, Florence, Italy
[32] Spedali Civili Brescia, Gen Surg Unit, Montichiari, BS, Italy
[33] San Gerardo Hosp, Gen Surg Unit, Monza, Italy
[34] St Andrea Hosp, Gen Surg Unit, La Spezia, Italy
[35] San Camillo Hosp, Gen Surg Unit, Rome, Italy
[36] Santo Spirito Hosp, Gen Surg Unit, Pescara, Italy
[37] Cardinale Pan Hosp, Gen Surg Unit, Tricase, LE, Italy
[38] IRCCS Sacro Cuore Don Calabria Hosp, Gen Surg Unit, Negrar Di Valpolicella, VR, Italy
[39] ASUR Marche AV5, Gen Surg Unit, Osped CEG Mazzoni, Via Iris Snc, I-63100 Ascoli Piceno, Italy