1. Department of Rheumatology, Dokkyo Medical University , Tochigi, Japan
2. Department of Allergy and Clinical Immunology, Graduate School of Medicine, Chiba University , Chiba, Japan
3. Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine , Tokyo, Japan
4. AbbVie GK , Tokyo, Japan
5. AbbVie Inc. , North Chicago, IL, USA
6. Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine , Kyoto, Japan