Sz-Tsan Wang1, Jing-Chi Lin2, Cheng-Feng Li2, Ying-Hsuan Lee3. 1. Division of Allergy and Immunology and Rheumatology, Dalin Tzu Chi Hospital, Chiayi, Taiwan. 2. Division of Allergy and Immunology and Rheumatology, Chang Gung Memorial Hospital, Chiayi, Taiwan. 3. Department of Rheumatology & Immunology, China Medical University Hospital, Taichung, Taiwan.