1. Division of Endocrinology and Metabolism, Department of Medicine, Veterans General Hospital-Taipei, Taipei, Taiwan; Division of Endocrinology, Department of Medicine, Taipei Medical University Wan-Fang Hospital, Taipei, Taiwan.
2. Division of Endocrinology and Metabolism, Department of Medicine, Veterans General Hospital-Taipei, Taipei, Taiwan; Department of Medicine, Provincial Hsin-Chu Hospital, Hsin-Chu, Taiwan, ROC.
3. Division of Endocrinology and Metabolism, Department of Medicine, Veterans General Hospital-Taipei, Taipei, Taiwan; National Yang-Ming University School of Medicine, Taipei, Taiwan.
4. Division of Endocrinology, Department of Medicine, Taipei Medical University Wan-Fang Hospital, Taipei, Taiwan.
5. Section of Endocrinology, Diabetes and Nutrition, Boston Medical Center, Boston, Massachusetts.