1 Department of Rheumatology and Department of Diabetes and Endocrinology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi, 409-3898, Japan.
2 Department of Rheumatology, University of Yamanashi Hospital, 1110 Shimokato, Chuo-shi, Yamanashi 409-3898, Japan.