Affiliation: | 1Division of Rheumatology, Department of Internal Medicine, The Catholic University of Korea,505 Banpo-dong, Seocho-gu, Seoul 137-701, Korea;2The Rheumatism Research Center, Catholic Research Institute of Medical Science, The Catholic University of Korea, 505 Banpo-dong, Seocho-gu, Seoul 137-701l, Korea |