1. Center of Geriatrics and Gerontology, Taichung Veterans General Hospital, Taiwan
2. Division of Nephrology, Department of Internal Medicine, Taichung Veterans General Hospital, Taiwan
3. Institute of Clinical Medicine, Yang-Ming University, Taiwan
4. School of Medicine, Chung Shan Medical University, Taiwan
5. Department of Family Medicine, Taichung Veterans General Hospital, Taiwan
6. Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taiwan
7. Institutes of Physiology, National Yang-Ming University, Taiwan
8. Division of Nephrology, Department of Medicine and Immunology Research Center, Taipei Veterans General Hospital, Taiwan
9. Division of Allergy, Immunology and Rheumatology, Taichung Veterans General Hospital, Taiwan