1. Division of Cardiology, Department of Internal Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea
2. Division of Rheumatology, Department of Internal Medicine, Daedong Hosipital, Busan, Korea
3. Department of Pathology, Pusan National University Yangsan Hospital, Yangsan, Korea
4. Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
5. Division of Infectious Disease, Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea