[1] Univ Alcala, Gastroenterol & Hepatol Dept, Hosp Univ Ramon Cajal, Inst Ramon Cajal Invest Sanitaria IRYCIS, Madrid, Spain
[2] Inst Salud Carlos III, Ctr Invest Biomed Red Enfermedades Hepat & Diges, Madrid, Spain
[3] Porto Comprehens Canc Ctr Porto CCC, Porto, Portugal
[4] RISE CI IPOP Hlth Res Network, Porto, Portugal
[5] Dartmouth Geisel Sch Med, Hanover, NH USA
[6] VA White River Junct, Hampshire & Sect Gastroenterol & Hepatol, Hartford, CT USA
[7] Univ Texas Austin, Div Gastroenterol & Hepatol, Dell Med Sch, Austin, TX USA
[8] Univ Libre Bruxelles, Erasme Univ Hosp, Dept Gastroenterol, Brussels, Belgium
[9] Kings Coll Hosp London, Kings Hlth Partners Inst Therapeut Endoscopy, London, England
[10] St Marks Hosp, Wolfson Unit Endoscopy, London, England
[11] Univ Warsaw, Dept Gastroenterol & Internal Med, Clin Hosp Med, Warsaw, Poland
[12] Portsmouth Hosp NHS Trust, Gastroenterol, Portsmouth, Hants, England
[13] Univ Oslo, Clin Effect Res Grp, Oslo, Norway
[14] Oslo Univ Hosp, Dept Transplantat Med, Oslo, Norway
[15] Univ Hosp Padua, Endoscopy Dept, Padua, Italy
[16] Northumbria Healthcare NHS Trust, Endoscopy Dept, Northumberland, England
[17] Klinikum Hanau, Klin Gastroenterol Diabetol Infektiol, Hanau, Germany
[18] Univ Coll London Hosp, Dept Gastroenterol, London, England
[19] Maria Sklodowska Curie Natl Res Inst Oncol, Dept Canc Prevent, Warsaw, Poland
[20] Maria Sklodowska Curie Natl Res Inst Oncol, Dept Oncol Gastroenterol, Warsaw, Poland
[21] Clin Hosp Ctr Rijeka, Dept Gastroenterol, Endoscopy Unit, Rijeka, Croatia
[22] Univ & Polytechn Fe Hosp IIS Fe, Dept Gastroenterol, Valencia, Spain
[23] Univ Barcelona, Dept Gastroenterol, Hosp Clin Barcelona, Ctr Invest Biomed Red Enfermedades Hepat Digest, Barcelona, Spain
[24] Univ Barcelona, Inst Invest Biomed August Pi Sunyer IDIBAPS, Barcelona, Spain
[25] Hosp Civils Lyon, Endoscopy Unit, Lyon, France
[26] Dudley Grp Hosp NHS Fdn Trust, Dept Gastroenterol, Dudley, England
[27] Radboud Univ Nijmegen, Dept Gastroenterol & Hepatol, Med Ctr, Nijmegen, Netherlands
[28] Ulster Hosp, Div Gastroenterol, Belfast, Antrim, North Ireland
[29] Natl & Kapodistrian Univ Athens, Attikon Univ Gen Hosp, Hepatogastroenterol Unit, Dept Internal Med Propaedeut 2,Med Sch, Athens, Greece
[30] Conegliano Hosp, Digest Endoscopy Unit, ULSS Marca Trevigiana 2, Conegliano, Italy
[31] Royal Wolverhampton NHS Trust, Dept Gastroenterol, Wolverhampton, England
[32] Colentina Clin Hosp, Dept Gastroenterol & Hepatol, Bucharest, Romania
[33] Hop Prive dAntony, Antony, France
[34] Catholic Univ Leuven KUL, Univ Hosp Leuven, Dept Gastroenterol & Hepatol, TARGID, Leuven, Belgium
[35] Humanitas Univ, Dept Biomed Sci, Pieve Emanuele & Endoscopy Unit, IRCCS Humanitas Clin & Res Ctr, Milan, Italy
[36] Emek Med Ctr, Ellen & Pinchas Mamber Inst Gastroenterol & Hepat, Afula, Israel
[37] Technion Israel Inst Technol, Rappaport Fac Med, Haifa, Israel
[38] III Med Klin Univ Augsburg, Augsburg, Germany