1. Division of Rheumatology; Seoul Metropolitan Government-Seoul National University Boramae Medical Center; Seoul Korea
2. Division of Rheumatology, Department of Internal Medicine; Gachon University Gil Medical Center; Incheon Korea
3. Division of Rheumatology, Department of Internal Medicine; Kyungpook National University Hospital; Daegu Korea
4. Division of Rheumatology, Department of Internal Medicine, Samsung Medical Center; Sungkyunkwan University; Seoul Korea
5. Division of Rheumatology, Department of Internal Medicine; Chungnam National University Hospital; Daejeon Korea
6. Division of Rheumatology, Department of Internal Medicine; Catholic University of Korea, Seoul St Mary's Hospital; Seoul Korea
7. Department of Rheumatology; Hanyang University Hospital for Rheumatic Diseases; Seoul Korea
8. Division of Rheumatology, Department of Internal Medicine; Seoul National University Bundang Hospital; Seongnam Korea
9. Division of Rheumatology, Department of Internal Medicine; Chungbuk National University Hospital; Cheongju Korea
10. Division of Rheumatology, Department of Internal Medicine; Seoul National University Hospital; Seoul Korea
11. Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, College of Medicine, Medical Research Institute; Seoul National University; Seoul Korea