Professor of Laboratory Medicine and Pathology, Adjunct Professor of Medicine;
Director, Gastrointestinal and Hepatic Pathology Program, University of Washington, Seattle, WA, USA.
Senior Vice President, Dean and Chair Professor, School of Medicine, College of Medicine, National Sun Yat-sen University;
Chair Professor, Hepatitis Research Center, College of Medicine, Kaohsiung Medical University;
Visiting staff, Hepatobiliary Section, Department of Internal Medicine, and Hepatitis Center, Kaohsiung Medical University Hospital, Kaohsiung;
Adjunct Professor, National Pingtung University of Science and Technology, Pingtung, Taiwan.
Professor and Chairman, Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Fukuoka, Japan.
Chair, University Medicine Cluster;
Senior Consultant, Division of Gastroenterology & Hepatology, Department of Medicine, National University Hospital and National University of Singapore, Singapore, Singapore.
Visiting Professor of Hepatology, Radcliffe Department of Medicine, University of Oxford, Oxford, UK;
Chairman- Summit Clinical Research, Chairman- Pinnacle Clinical Research, San Antonio, TX, USA.
Co-founder and Chief Scientific Officer of HistoIndex, Singapore, Singapore.