1. Division of Hepatogastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
2. Division of Hepatogastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
3. Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
4. School of Medicine, China Medical University, Taichung, Taiwan