1. Division of Rheumatology, Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
2. Department of Microbiology, Keimyung University School of Medicine, Daegu, Korea
3. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
4. Institute for Cancer Research, Keimyung University, Daegu, Korea