1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Puli Branch of Taichung Veterans General Hospital, Nantou, Taiwan.
2. Institute of Public Health and Community Medicine Research Center, National Yang-Ming University, Taipei, Taiwan.
3. Department of Family Medicine, Puli Branch of Taichung Veterans General Hospital, Nantou, Taiwan.
4. National Taichung University of Science and Technology, Taichung, Taiwan.