1. Department of Rheumatology and Clinical Immunology Sapporo Medical University School of Medicine Sapporo Japan
2. Department of Surgical Pathology Sapporo Medical University School of Medicine Sapporo Japan
3. Department of Surgery, Surgical Oncology and Science Sapporo Medical University School of Medicine Sapporo Japan
4. Department of Molecular Hematopathology Okayama University Graduate School of Health Sciences Okayama Japan