[1] Med Ctr Postgrad Educ, Dept Gastroenterol Hepatol & Oncol, Warsaw, Poland
[2] Maria Sklodowska Curie Mem Canc Ctr, Dept Gastroenterol Oncol, Warsaw, Poland
[3] Maria Sklodowska Curie Mem Canc Ctr, Dept Canc Prevent, Warsaw, Poland
[4] Inst Oncol, Warsaw, Poland
[5] Univ Oslo, Inst Hlth & Soc, Dept Hlth Management & Hlth Econ, Oslo, Norway
[6] Oslo Univ Hosp, KG Jebsen Ctr Colorectal Canc Res, Dept Transplantat Med, Oslo, Norway
[7] Harrow & Imperial Coll, St Marks Hosp, Wolfson Unit Endoscopy, London, England
[8] Oslo Univ Hosp, Dept Transplantat Med, Oslo, Norway
[9] South Tyneside NHS Fdn Trust, S Tyneside, England
[10] Univ Amsterdam, Acad Med Ctr, Dept Gastroenterol & Hepatol, Amsterdam, Netherlands
[11] Telemark Hosp, Dept Res & Dev, Skien, Norway
[12] Canc Registry Norway, Oslo, Norway
[13] Hosp Gen Univ Alicante, Unidad Gastroenterol, Alicante, Spain
[14] Charles Univ Prague, Dept Internal Med, Fac Med 1, Mil Univ Hosp, Prague, Czech Republic
[15] Med Univ Vienna, Div Gastroenterol & Hepatol, Dept Med 3, Vienna, Austria
[16] Gloucestershire Hosp NHS Fdn Trust, Cheltenham Gen Hosp, Gloucestershire, England
[17] Univ Hosp Hamburg, Dept Interdisciplinary Endoscopy, Hamburg, Germany
[18] Karolinska Inst, Stockholm, Sweden
[19] Karolinska Univ Hosp, Stockholm, Sweden
[20] Petz Aladar Cty & Teaching Hosp, Dept Internal Med & Gastroenterol, Gyor, Hungary
[21] Erasmus MC Univ Med Ctr, Dept Gastroenterol & Hepatol, Rotterdam, Netherlands
[22] Univ Oxford, John Radcliffe Hosp, Translat Gastroenterol Unit, Oxford, England
[23] Vestfold Hosp Trust, Dept Gastroenterol, Tonsberg, Norway
[24] Coventry Univ, Fac Hlth & Life Sci, Ctr Technol Enabled Res, Coventry, W Midlands, England
[25] AOU Citta Salute & Sci, CPO Piemonte, Turin, Italy
[26] Univ Hosp Leuven, Dept Gastroenterol & Hepatol, Leuven, Belgium
[27] Katholieke Univ Leuven, Leuven, Belgium
[28] Josephs Hosp, Dept Internal Med, Warendorf, Germany
[29] Gloucestershire Hosp NHS Fdn Trust, Dept Gastroenterol, Gloucestershire, England
[30] Agostino Gemelli Univ Hosp, Digest Endoscopy Unit, Rome, Italy
[31] Nuovo Regina Margherita Hosp, Rome, Italy
[32] Univ Porto, Fac Med, Ctr Hlth Technol & Serv Res CINTESIS, Oporto, Portugal
[33] Inst Portugues Oncol Francisco Gentil, Serv Gastroenterol, Oporto, Portugal
[34] Univ Hosp North Tees, Dept Gastroenterol, Cleveland, England
[35] Univ Durham, Sch Med, Durham, England