[1] Via Torino 49, I-76123 Andria, Barletta Andria, Italy
[2] ASL BAT, Terr Gastroenterol Serv, Andria, Barletta Adria, Italy
[3] Catholic Univ, Postgrad Sch Digest Dis, Dept Med & Surg Sci, Rome, Italy
[4] Humanitas Univ, Dept Biomed Sci, Milan, Italy
[5] IRCCS Humanitas Res Hosp, Milan, Italy
[6] Cristo Re Hosp, Div Internal Med & Gastroenterol, Rome, Italy
[7] Univ Parma, Dept Med & Surg Sci, Gastroenterol Unit, Parma, Italy
[8] San Camillo Hosp, Div Gastroenterol, Rome, Italy
[9] P Colombo Hosp, Div Surg, ASL RM6, Rome, Italy
[10] Santa Caterina Novella Hosp, Div Gastroenterol, Galatina, Lecce, Italy
[11] San Donato Hosp, Div Gastroenterol, Milan, Italy
[12] Inst Gastroenterol & Digest Endoscopy, Goiania, GO, Brazil
[13] Univ Perugia, Santa Maria della Misericordia Univ Hosp, Dept Med & Surg, Gastroenterol & Hepatol Unit, Perugia, Italy
[14] T Maresca Hosp, Div Gastroenterol, Naples, Italy
[15] San Matteo degli Infermi Hosp, Digest Endoscopy Unit, Spoleto, Perugia, Italy
[16] St Agostino Estense Hosp, Digest Endoscopy Unit, Baggiovara, Modena, Italy
[17] Iuliu Hatieganu Univ Med & Pharm, Med Dept 2, Cluj Napoca, Romania
[18] Cent Univ Venezuela, Loira Med Ctr, Caracas, Venezuela
[19] Villa dei Pini Home Care, Serv Digest Endoscopy, Civitanova Marche, Macerata, Italy
[20] Santa Maria Goretti Hosp, Digest Endoscopy Unit, Latina, Italy
[21] ULSS7 Alto Vicentino, Digest Endoscopy Unit, Santorso, Vicenza, Italy
[22] S Giovanni Addolorata Hosp, Div Gastroenterol & Digest Endoscopy, Rome, Italy
[23] Saarland Univ, Dept Med 2, Med Ctr, Homburg, Germany
[24] Hannover Med Sch MHH, Hlth Sci, Hannover, Germany
[25] Univ Aquila, San Salvatore Hosp, Dept Life Hlth & Environm Sci, Div Gastroenterol Hepatol & Nutr, Laquila, Italy
[26] L Sacco Univ Hosp, Div Gastroenterol, Milan, Italy
[27] Federici II Univ Hosp, Dept Clin Med & Surg, Div Gastroenterol & Hepatol, Naples, Italy
[28] Sao Jose Home Care, Dept Anorectal Physiol, Rio De Janeiro, Brazil
[29] Univ Fed Goias, Dept Colorectal Surg, Goiania, GO, Brazil
[30] Catholic Univ, IRCCS A Gemelli Hosp, Fdn Policlin Gemelli, Div Internal Med & Gastroenterol, Rome, Italy
[31] Kings Coll Hosp London, Dept Colorectal Surg, London, England
[32] Maria Sklodowska Curie Natl Res Inst Oncol, Ctr Postgrad Med Educ, Dept Gastroenterol Hepatol & Clin Oncol, Warsaw, Poland
[33] Sapienza Univ, Umberto I Univ Hosp, Div Gen Surg 1, Rome, Italy
[34] Vilnius Univ Hosp, Inst Clin Med, Vilnius, Lithuania
[35] Valle dItria Hosp, Digest Endoscopy Unit, Martina Franca, Taranto, Italy
[36] Pugliese Ciaccio Hosp, Div Gastroenterol, Catanzaro, Italy
[37] Digest Endoscopy Unit, Altamura, Bari, Italy
[38] Bucchieri La Ferla Hosp, Div Gastroenterol & Digest Endoscopy, Palermo, Italy
[39] Belcolle Hosp, Div Gastroenterol, Viterbo, Italy
[40] Nuovo Regina Margherita Terr Hosp, Div Gastroenterol, Rome, Italy
[41] Sapienza Univ Rome, Dept Surg, Polo Pontino, Terracina, Latina, Italy
[42] IRCCS Osped San Raffaele, Gastroenterol & Endoscopy, Milan, Italy
[43] Univ Vita Salute San Raffaele, Milan, Italy