1. Section of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.
2. Division of Endocrinology and Metabolism, Buddhist Tzu Chi Medical Foundation Dalin Tzu Chi Hospital, Chiayi, Taiwan.
3. Department of Internal Medicine, National Yang-Ming University Hospital, Yilan, Taiwan.
4. Department of Internal Medicine, School of Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.