1. Department of Rheumatology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan;
2. Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, Kyoto, Japan;
3. Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan;
4. Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan;
5. Department of Neurology, Kawasaki Medical School, Okayama, Japan;
6. Department of Dermatology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan;
7. Department of Rheumatology, Tokyo Women's Medical University, Tokyo, Japan;
8. Department of Dermatology, Wakayama Medical University Graduate School of Medicine, Wakayama, Japan;
9. Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan;
10. Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan;
11. Division of Public Health, Department of Social Medicine, Faculty of Medicine, Saitama Medical University, Saitama, Japan;
12. Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan