1. Department of Emergency Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
2. Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
3. Department of Allergy, Immunology & Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan and
4. Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan