[1] Univ Hosp Maastricht, Dept Gastroenterol & Hepatol, Maastricht, Netherlands
[2] Univ Crete, Dept Biostat & Epidemiol, Iraklion, Greece
[3] Dept Gastroenterol & Hepatol, Copenhagen, Denmark
[4] Hvidovre Univ Hosp, Copenhagen, Denmark
[5] Univ Maastricht, Dept Data Informat & Management, Maastricht, Netherlands
[6] Cent Hosp Ostfold, Dept Gastroenterol, Fredrikstad, Norway
[7] Soroka Univ Hosp, Dept Gastroenterol, Beer Sheva, Israel
[8] Univ Hosp Ioannina, Ioannina, Greece