1 Department of Public Health, College of Public Health, and School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan.
2 Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan.
3 Department of Occupational Safety and Health, College of Public Health, China Medical University, Taichung, Taiwan.
4 School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan.
5 College of Medicine, Tzu Chi University, Hualien, Taiwan. kuanfuliaog@gmail.com.
6 Division of Hepatogastroenterology, Department of Internal Medicine, Taichung Tzu Chi Hospital, No. 66, Sec. 1, Fongsing Road, Tanzi District, Taichung City, 427, Taiwan. kuanfuliaog@gmail.com.