1. Department of Public Health, College of Public Health, and School of Medicine, College of Medicine, China Medical University, Taichung, TaiwanDepartment of Family Medicine, China Medical University Hospital, Taichung, Taiwan
2. College of Medicine, Tzu Chi University, Hualien, Taiwan, Division of Hepatogastroenterology, Department of Internal Medicine, Taichung Tzu Chi Hospital, Taichung, Taiwan
3. Department of Research, Taichung Tzu Chi Hospital, Taichung, Taiwan
4. Department of Occupational Safety and Health, College of Public Health, China Medical University, Taichung, Taiwan
5. Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan.