1. Department of Medicine II; Saarland University Medical Center; Homburg Germany
2. Clinic of Gastroenterology and Rheumatology; Division of Hepatology; Leipzig University Hospital; Leipzig Germany
3. Liver Center of Beijing Ditan Hospital; Capital Medical University; Beijing China
4. Division of Hepatology; Department of Medicine; Feinberg School of Medicine; Northwestern University; Chicago IL USA
5. Liver Research Center; Beijing Friendship Hospital; Capital Medical University; Beijing China
6. Center of Excellence in Gastrointestinal Inflammation and Immunity Research; University of Alberta; Edmonton AB Canada