1. Molecular and Genetic Epidemiology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan;
2. Clinical Research Center for Allergy and Rheumatology, National Hospital Organization Sagamihara National Hospital, Sagamihara, Japan;
3. Department of Rheumatology, National Hospital Organization Sagamihara National Hospital, Sagamihara, Japan;
4. Department of Rheumatic Diseases, Tokyo Metropolitan Tama Medical Center, Fuchu, Japan;
5. Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan;
6. Department of Rheumatology, Yokohama Minami Kyosai Hospital, Yokohama, Japan;
7. Department of Rheumatology, National Hospital Organization Yokohama Medical Center, Yokohama, Japan;
8. Department of Dermatology, Faculty of Medicine, Institute of Medical, Pharmaceutical, and Health Sciences, Kanazawa University, Kanazawa, Japan;
9. Department of Rheumatology, Kin-ikyo Chuo Hospital, Sapporo, Japan;
10. Department of Clinical Laboratory, National Hospital Organization Sagamihara National Hospital, Sagamihara, Japan;
11. Department of Internal Medicine, Nagoya Medical Center, National Hospital Organization, Nagoya, Japan;
12. Department of Rheumatology, Himeji Medical Center, National Hospital Organization, Himeji, Japan;
13. Department of Allergy and Immunological Diseases, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan;
14. Department of Internal Medicine, Teikyo University, Tokyo, Japan;
15. National Hospital Organization Tokyo National Hospital, Kiyose, Japan