1. Department of Internal Medicine, Kaohsiung Veterans General Hospital , Tainan Branch, Tainan , Taiwan
2. Department of Allergy, Immunology & Rheumatology, Chung Shan Medical University Hospital , Taichung , Taiwan
3. Institute of Medicine, Chung Shan Medical University , Taichung , Taiwan
4. Graduate Institute of Integrated Medicine, China Medical University , Taichung , Taiwan
5. Department of Medical Research, Taichung Veterans General Hospital , Taichung , Taiwan