1. Institute of Digestive Disease and The Dept. of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China
2. Dept. of Medicine II, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
3. Dept. of Pathology, Christian-Albrechts University, Kiel, Germany