Affiliation: | (1) Department of Rheumatology, The Hospital for Rheumatic Diseases, Hanyang University, Haengdang-Dong, Sungdong-Gu, Seoul, 133-792, Korea;(2) Institute of Rheumatism, Hanyang University, Haengdang-Dong, Sungdong-Gu, Seoul, 133-792, Korea |