1. School of Medicine, Chung Shan Medical University, Taichung 402, Taiwan
2. Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan
3. School of Medicine, National Cheng Kung University, Tainan 701, Taiwan
4. Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 833, Taiwan
5. Department of Neurology, Chung Shan Medical University Hospital, Taichung 402, Taiwan
6. Department of Allergy, Immunology & Rheumatology, Chung Shan Medical University Hospital, Taichung 402, Taiwan
7. Graduate Institute of Integrated Medicine, China Medical University, Taichung 402, Taiwan
8. Institute of Medicine, Chung Shan Medical University, Taichung 402, Taiwan