Shih-Wei Lai1, Yu-Hung Kuo2, Kuan-Fu Liao3. 1. College of Medicine, China Medical University, Taichung, Taiwan; Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan. 2. Department of Research, Taichung Tzu Chi Hospital, Taichung, Taiwan. 3. College of Medicine, Tzu Chi University, Hualien, Taiwan; Division of Hepatogastroenterology, Department of Internal Medicine, Taichung Tzu Chi Hospital, Taichung, Taiwan.