1. Department of Rheumatology; Chonnam National University Hospital & Medical School; Gwangju Korea
2. Department of Internal Medicine; Inje University Haeundae Paik Hospital; Busan Korea
3. Department of Internal Medicine; College of Medicine; Soonchunhyang University; Cheonan Korea
4. Department of Internal Medicine; Maryknoll Medical Center; Busan Korea
5. Department of Internal Medicine; School of Medicine; Catholic University of Daegu; Korea
6. Department of Internal Medicine; School of Medicine; Kyung Hee University; Seoul Korea
7. Department of Internal Medicine; Soonchunhyang University Seoul Hospital; Korea
8. Hanyang University College of Medicine and the Hospital for Rheumatic Diseases; Seoul Korea
9. Department of Allergy and Rheumatology; Ajou University Hospital; Ajou University School of Medicine; Suwon Korea
10. Department of Internal Medicine; Konyang University Medical School; Daejeon Korea
11. Department of Internal Medicine; School of Medicine; Keimyung University; Daegu Korea