Kuan-Fu Liao1,2, Shih-Wei Lai3,4. 1. College of Medicine, Tzu Chi University, Hualien, Taiwan. 2. Division of Hepatogastroenterology, Department of Internal Medicine, Taichung Tzu Chi General Hospital, Taichung, Taiwan. 3. College of Medicine, China Medical University, Taichung, Taiwan. 4. Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan.