1. Department of Rheumatology, Osaki Citizen Hospital, Osaki, Japan;
2. Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan;
3. Department of Nephrology and Endocrinology, Osaki Citizen Hospital, Osaki, Japan;
4. Department of Dermatology, Osaki Citizen Hospital, Osaki, Japan;
5. Department of Pathology, Osaki Citizen Hospital, Osaki, Japan;
6. Department of Gastroenterology, Osaki Citizen Hospital, Osaki, Japan