1. Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan.
2. Division of Rheumatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan, and Laboratory of Experimental Rheumatology and Neuroendocrine Immunology, Department of Internal Medicine I, University Hospital Regensburg, Germany. knoda3353@jikei.ac.jp