1. Division of Endocrinology and Metabolism, Department of Internal Medicine; Taichung Veterans General Hospital; Taichung Taiwan
2. Institute of Clinical Medicine, School of Medicine; National Yang-Ming University; Taipei Taiwan
3. Department of Medicine, School of Medicine; Chung Shan Medical University; Taichung Taiwan
4. Department of Medicine, School of Medicine; National Yang-Ming University; Taipei Taiwan
5. Department of Medical Research, Taichung Veterans General Hospital; Taichung Taiwan
6. Division of Endocrinology and Metabolism, Department of Internal Medicine; Chang-Hua Christian Hospital; Chang-Hua Taiwan
7. Center of Geriatrics and Gerontology; Taichung Veterans General Hospital; Taichung Taiwan
8. Institute of Medical Technology, College of Life Science; National Chung-Hsing University; Taichung Taiwan
9. School of Medicine, National Defense Medical Center; Taipei Taiwan