1. Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan.
2. Division of Endocrinology and Metabolism, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan.
3. School of Medicine, Chung Shan Medical University, Taichung, Taiwan.
4. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan.
5. Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan.