[1] Univ Oslo, Clin Effectiveness Res Grp, Sognsvannsveien 21, N-0372 Oslo, Norway
[2] Oslo Univ Hosp, Dept Transplantat Med, Oslo, Norway
[3] Showa Univ, Northern Yokohama Hosp, Digest Dis Ctr, Yokohama, Japan
[4] Med Univ Vienna, Vienna, Austria
[5] Maria Sklodowska Curie Mem Canc Ctr & Inst Oncol, Warsaw, Poland
[6] Erasmus MC Univ, Med Ctr, Dept Gastroenterol & Hepatol, Rotterdam, Netherlands
[7] Hosp Civils Lyon, Edouard Herriot Hosp, Gastroenterol & Endoscopy Unit, Lyon, France
[8] Univ Hosp Augsburg, Dept Gastroenterol, Augsburg, Germany
[9] Emek Med Ctr, Ellen & Pinchas Mamber Inst Gastroenterol & Hepat, Afula, Israel
[10] Technion Israel Inst Technol, Rappaport Fac Med, H_eifa, Israel
[11] Katholieke Univ Leuven, Univ Hosp Leuven, Dept Gastroenterol & Hepatol, Leuven, Belgium
[12] Katholieke Univ Leuven, TARGID, Leuven, Belgium
[13] Humanitas Univ, Dept Biomed Sci, Pieve Emanuele, Italy
[14] Humanitas Clin & Res Ctr IRCCS, Endoscopy Unit, Rozzano, Italy