1. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
2. Division of Rheumatology, Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, Republic of Korea
3. Division of Rheumatology, Department of Internal Medicine, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
4. Department of Rheumatology, Ajou University School of Medicine, Suwon, Republic of Korea