Department of Rheumatology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Chuo-ku, Hamamatsu, Shizuoka, Japan

Soma Fukami, Shin-ichiro Ohmura, Toshitaka Yukishima, Haruka Yonezawa, Yusuke Ohkubo & Toshiaki Miyamoto

Department of Radiology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Chuo-ku, Hamamatsu, Shizuoka, Japan

Takayuki Masui

Department of Pathology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Chuo-ku, Hamamatsu, Shizuoka, Japan

Yoshiro Otsuki

Division of Immunology and Rheumatology, Third Department of Internal Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Chuo-ku, Hamamatsu, Shizuoka, Japan

Kumiko Shimoyama