1. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
2. Hanyang University Institute of Rheumatologic Research, Seoul, Republic of Korea
3. Department of Rheumatology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
4. Department of Rheumatology, Ajou University School of Medicine, Suwon, Republic of Korea
5. Department of Rheumatology, Daegu Catholic University Medical Center, Daegu, Republic of Korea