Shih-Wei Lai1,2,3, Yu-Hung Kuo4, Kuan-Fu Liao5,6. 1. College of Medicine, China Medical University, Taichung, Taiwan. wei@mail.cmuh.org.tw. 2. Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan. wei@mail.cmuh.org.tw. 3. Division of Hepatogastroenterology, Department of Internal Medicine, Taichung Tzu Chi Hospital, No.66, Sec. 1, Fongsing Road, Tanzi District, Taichung City, 427, Taiwan. wei@mail.cmuh.org.tw. 4. Department of Research, Taichung Tzu Chi Hospital, Taichung, Taiwan. 5. Division of Hepatogastroenterology, Department of Internal Medicine, Taichung Tzu Chi Hospital, No.66, Sec. 1, Fongsing Road, Tanzi District, Taichung City, 427, Taiwan. 6. College of Medicine, Tzu Chi University, Hualien, Taiwan.