1. Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, Korea.
2. Arthritis and Autoimmunity Research Center, Catholic University of Daegu School of Medicine, Daegu, Korea.
3. Department of Radiology, Catholic University of Daegu School of Medicine, Daegu, Korea.
4. Department of Preventive Medicine, Catholic University of Daegu School of Medicine, Daegu, Korea.