1. Division of Rheumatology, Department of Internal Medicine, Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
2. Division of Rheumatology, Department of Internal Medicine, Keimyung University Dongsan Medical Centre, Daegu, South Korea
3. Division of Rheumatology, Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, South Korea
4. Division of Rheumatology, Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, South Korea
5. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
6. Division of Rheumatology, Department of Internal Medicine, Chonnam National University School of Medicine, Gwangju, South Korea