1. Department of Rheumatology and Musculoskeletal Medicine, Yoshii Clinic, M.D. 6-7-5 Nakamura-Ohashidori, Shimanto City 787-0033, Japan
2. Department of Rheumatology, Kochi Memorial Hospital, Kochi City 780-0824, Japan
3. Department of Rheumatology, Dohgo Onsen Hospital, Matsuyama 790-0858, Japan