[1] Sapienza Univ Rome, Dept Anat Histol Forens Med & Orthoped Sci, Rome, Italy
[2] Osped Castelli Hosp, Gastroenterol & Digest Endoscopy Unit, Ariccia, Rome, Italy
[3] Colentina Clin Hosp, Dept Gastroenterol, Bucharest, Romania
[4] Carol Davila Univ Med & Pharm, Bucharest, Romania
[5] Hosp Minist Interior & Adm, Gastroenterol Dept, Endoscopy Unit, Szczecin, Poland
[6] Univ Toronto, St Michaels Hosp, Ctr Therapeut Endoscopy & Endoscop Oncol, Toronto, ON, Canada
[7] Hosp Senhora Oliveira, Gastroenterol Dept, Guimaraes, Portugal
[8] Univ Minho, Life & Hlth Sci Res Inst ICVS, Sch Med, Braga, Portugal
[9] Semmelweis Univ, Internal Med & Hematol Dept, Gastroenterol Div, Budapest, Hungary
[10] Katholieke Univ Leuven, Univ Hosp Leuven, Dept Gastroenterol & Hepatol, Leuven, Belgium
[11] Imelda Gen Hosp, Dept Gastroenterol & Hepatol, Bonheiden, Belgium
[12] Univ Leipzig Med Ctr, Div Gastroenterol, Med Dept 2, Leipzig, Germany
[13] Menoufia Univ, Natl Liver Inst, Hepatol & Gastroenterol Dept, Menoufia, Egypt
[14] ESGENA Sci Secretary, Ulm, Germany
[15] IHU Strasbourg, Strasbourg, France
[16] Fdn Policlin Univ A Gemelli IRCCS, Rome, Italy
[17] Hosp Clin Barcelona, Dept Gastroenterol, Barcelona, Spain
[18] Portuguese Oncol Inst Porto, Gastroenterol Dept, Porto, Portugal
[19] Univ Porto, Fac Med, MEDCIDS, Porto, Portugal
[20] Attikon Univ Hosp, Gastroenterol Dept, Chaidari, Greece
[21] Univ Hosp Leuven, Dept Gastroenterol & Hepatol, TARGID, Leuven, Belgium
[22] Humanitas Univ, Dept Biomed Sci, Milan, Italy
[23] IRCCS Humanitas Res Hosp, Endoscopy Unit, Milan, Italy
[24] Univ Augsburg, Fac Med, Dept Gastroenterol, Augsburg, Germany
[25] Emek Med Ctr, Inst Gastroenterol & Hepatol, Afula, Israel
[26] Technion Israel Inst Technol, Rappaport Fac Med, Haifa, Israel
[27] Osped Castelli Hosp, Dept Gastroenteorl & Digest Endoscopy, Via Nettunense Km 11-5, I-00041 Ariccia, Rome, Italy