1. Department of Radiology; St. Marianna University School of Medicine; Kawasaki Japan
2. Divisions of Hematology and Rheumatology; Department of Medicine; Nihon University School of Medicine; Tokyo Japan
3. Division of Rheumatology; Itabashi Chuo Medical Center; Tokyo Japan
4. Division of Rheumatology; Columbia University; College of Physicians and Surgeons; New York City New York USA
5. Division of Cardiology; Tokyo Medical Collage; Tokyo Japan