1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Institute of Clinical Medicine, School of Medicine, National Yang Ming University, Taichung, Taiwan, Republic of China.
2. Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan, Republic of China.
3. Division of Biochemistry, Medical Laboratories, Taichung Veterans General Hospital, Taichung, Taiwan, Republic of China.
4. Department of Surgery, Taichung Veterans General Hospital, Taichung, Taiwan, Republic of China.
5. Division of Family Medicine, Taichung Veterans General Hospital, Taichung, Taiwan, Republic of China.