1. Department of Rheumatology, Chikamori Hospital, Kochi, Japan
2. Department of Neurology, Tokushima University School of Medicine, Tokushima, Japan
3. Department of Radiology, St. Luke’s International Hospital, Tokyo, Japan
4. Faculty of Nursing, University of Kochi, Kochi, Japan
5. Department of Neurology, Tenri Hospital, Kyoto, Japan
6. School of Medicine, Division of Rheumatology, Johns Hopkins University, Baltimore, MD, USA