1. Division of Rheumatology, Department of Internal Medicine University of Ulsan College of Medicine, Ulsan University Hospital Ulsan South Korea
2. Division of Rheumatology, Department of Internal Medicine Haeundae Paik Hospital, Inje University College of Medicine Busan South Korea
3. Division of Rheumatology, Department of Internal Medicine Pusan National University Yangsan Hospital Yangsan South Korea
4. Department of Biomedical Informatics, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea