1. Department of Internal Medicine, Chung Shan Medical University Hospital
2. School of Medicine, Chung Shan Medical University
3. Department of Medical Research, Chung Shan Medical University Hospital
4. Institute of Medicine, Chung Shan Medical University
5. Department of Family and Community Medicine, Chung Shan Medical University Hospital
6. Department of Occupational Medicine, Chung Shan Medical University Hospital , Taichung, Taiwan