1. Department of Blood Transfusion Medicine Nara Medical University Kashihara Japan
2. Japanese Red Cross Kinki Block Blood Center Ibaraki Japan
3. Division of Hematology Hamamatsu University School of Medicine Hamamatsu Japan
4. Department of Hematology Hyogo College of Medicine Hospital Nishinomiya Japan
5. Department of Medical Oncology Niigata University Graduate School of Medical and Dental Sciences Niigata University Niigata Japan
6. Department of Pediatrics Sapporo‐Kosei General Hospital Sapporo Japan
7. Center for Blood Transfusion and Cell Therapy Medical Hospital Tokyo Medical and Dental University Tokyo Japan
8. Department of Hematology Gunma University Graduate School of Medicine Maebashi Japan
9. Department of Internal Medicine Sano Memorial Clinic Fujinomiya Japan
10. Division of Hematology Tokushima Red Cross Hospital Komatsushima Japan
11. Department of Molecular Pathogenesis National Cerebral and Cardiovascular Center Suita Japan
12. Department of Cerebrovascular Medicine National Cerebral and Cardiovascular Center Suita Japan
13. Department of Pathology National Cerebral and Cardiovascular Center Suita Japan