Institution: | Hidekatsu Yanai, Yoshinori Masui, Reo Yoshikawa, Junwa Kunimatsu, Department of Internal Medicine, Kohnodai Hospital, National Center for Global Health and Medicine, Chiba 272-8516, Japan;Hiroshi Kaneko, Department of Rheumatology, Kohnodai Hospital, National Center for Global Health and Medicine, Chiba 272-8516, Japan |