[1] Erasmus MC Univ, Med Ctr, Dept Gastroenterol & Hepatol, Rotterdam, Netherlands
[2] Free Univ Amsterdam, Dept Internal Med, Med Ctr, Amsterdam, Netherlands
[3] Free Univ Amsterdam, Med Ctr, Dept Pathol, Amsterdam, Netherlands
[4] Free Univ Amsterdam, Med Ctr, Dept Oncol, Amsterdam, Netherlands
[5] State Univ Ghent Hosp, Dept Gastroenterol & Hepatol, B-9000 Ghent, Belgium
[6] Univ Klinikum Essen, Klin Gastroenterol & Hepatol, Essen, Germany
[7] Kirin Brewery Co Ltd, Div Pharmaceut, Tokyo, Japan