1. Department of Rheumatology and Clinical Immunology, Sapporo Medical University Hospital
2. Department of Hematology, Hokkaido University Hospital
3. Division of Rheumatology, Asahikawa Medical University Hospital
4. Department of Medical Oncology, Sapporo Medical University Hospital
5. Department of Pathology, Sapporo Medical University School of Medicine
6. Department of Respiratory Medicine, Kita-harima Medical Center
7. Department of General Medicine, Nerima Hikarigaoka Hospital