1. Division of Rheumatology and Allergology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan;
2. Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan;
3. Division of Pathology, St. Marianna University School of Medicine, Kawasaki, Japan;
4. Division of Radiology, Tokyo Medical University Ibaraki Medical Center, Ibaraki, Japan;
5. Medical Center for Rheumatic Diseases, Seirei-Yokohama Hospital, Yokohama, Japan