1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan
2. School of Medical, Chung Shan Medical University, Taichung 402, Taiwan
3. Institute of Medicine, Chung Shan Medical University, Taichung 402, Taiwan
4. Department of Medical Applied Chemistry, Chung Shan Medical University, Taichung 402, Taiwan
5. Department of Health Industry Technology Management, Chung Shan Medical University, Taichung 402, Taiwan
6. Department of Medical Research, Chung Shan Medical University Hospital, Taichung 402, Taiwan