[1] Univ Hosp Copenhagen, Amager & Hvidovre Hosp, Gastrounit, Div Med, Hvidovre, Denmark
[2] Tartu Univ Hosp, Div Gastroenterol, Tartu, Estonia
[3] Herning Cent Hosp, Dept Med, Herning, Denmark
[4] Natl Hosp Faroe Islands, Dept Med, Thorshavn, Faroe Islands
[5] Univ Hosp Ctr Zagreb, Dept Gastroenterol Hepatol & Nutr, Zagreb, Croatia
[6] Slagelse Reg Hosp, Dept Gastroenterol, Slagelse, Denmark
[7] Odense Univ Hosp, Dept Med Gastroenterol, Odense, Denmark
[8] Orebro Univ, Dept Gastroenterol, Fac Med & Hlth, Orebro, Sweden
[9] Hull Univ Teaching Hosp NHS Trust, Dept Gastroenterol, Kingston Upon Hull, N Humberside, England
[10] Univ Med Victor Babes, Gastroenterol Clin, Timisoara, Romania
[11] Imperial Coll London, IBD Dept, London, England
[12] Tampere Univ Hosp, Dept Gastroenterol & Alimentary Tract Surg, Tampere, Finland
[13] Tampere Univ, Fac Med & Hlth Technol, Tampere, Finland
[14] Viborg Hosp, Dept Med, Viborg, Denmark
[15] Univ Hosp Southern Denmark, Inst Reg Hlth Res, Res Unit Mol Diagnost & Clin Res, Aabenraa, Denmark
[16] Univ Hosp Southern Denmark, Inst Reg Hlth Res, Res Unit Mol Diagnost & Clin Res, Sonderborg, Denmark
[17] Univ Southern Denmark, Inst Mol Med, Odense, Denmark
[18] Univ Southern Denmark, Inst Reg Res, Odense, Denmark
[19] Univ Hosp, Ioannina, Greece
[20] Univ Ioannina, Div Gastroenterol, Ioannina, Greece
[21] Nicolae Testemitanu State Univ Med & Pharm Moldov, Fac Med, Kishinev, Moldova
[22] Mater Dei Hosp, Div Gastroenterol, Msida, Malta
[23] Lithuanian Univ Hlth Sci, Dept Gastroenterol, Kaunas, Lithuania
[24] Amiens Univ Hosp, Gastroenterol Unit, Amiens, France
[25] Amer Gastroenterol Ctr, Nicosia, Cyprus
[26] Univ Padua, Dept Surg Oncol & Gastroenterol Sci, Padua, Italy
[27] Xest Integrada Vigo SERGAS, Dept Gastroenterol, Vigo, Spain
[28] Galicia Hlth Res Inst IIS Galicia Sur, SERGAS UVIGO, Res Grp Digest Dis, Vigo, Spain
[29] Ribera POVISA Hosp, Dept Gastroenterol, Vigo, Spain
[30] Univ Hosp Copenhagen, Herlev Hosp, Dept Gastroenterol, Herlev, Denmark
[31] Univ Hosp Copenhagen, North Zealand Hosp, Dept Gastroenterol, Hillerod, Denmark