Affiliation: | (1) Department of Internal Medicine, Chonbuk National University Medical School and Research Institute of Clinical Medicine, Chonbuk, Korea;(2) Division of Rheumatology, Department of Internal Medicine, Chonbuk National University Medical School and Research Institute of Clinical Medicine, #634–18 Keumam Dong, Dukjin Gu, Chonju Chonbuk 561–712, Korea |