1. Center for Rheumatic disease, Yokohama City University Medical Center, Yokohama, Japan
2. Department of Internal Medicine and Clinical Immunology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
3. Department of Rheumatology and Infectious disease, Yokohama Minami Kyosai Hospital, Yokohama, Japan
4. Department of Radiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan