1. Division of Rheumatology, Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
2. Department of Emergency Medical Technology, Gyeongbuk Provincial College, Yecheon, Korea
3. Department of Biomedical Engineering, Korea University College of Health Science, Seoul, Korea
4. Department of Rheumatology, Eulji Rheumatology Research Institute, Eulji University School of Medicine, Uijeongbu, Korea