Meng-Chih Lee, MD, Ph.D. 1. Institute of Medicine, Chung Shan Medical University, Taichung 41331, Taiwan. 2. Department of Family Medicine, Taichung Hospital, Ministry of Health and Welfare, Taichung 40343, Taiwan. 3. Institute of Population Health Sciences, National Health Research Institutes 35053, Miaoli, Taiwan. 4. College of Management, Chaoyang University of Technology, Taichung 40201, Taiwan.