1. Department of Hematology Hokkaido University Faculty of Medicine, Graduate School of Medicine Sapporo Japan
2. Blood Disorders Center Aiiku Hospital Sapporo Japan
3. Department of Hematology Sapporo Hokuyu Hospital Sapporo Japan
4. Department of Hematology Sapporo City General Hospital Sapporo Japan
5. Department of Hematology Kushiro Rosai Hospital Kushiro Japan
6. Department of Internal Medicine Kitami Red Cross Hospital Kitami Japan
7. Department of Hematology Tenshi Hospital Sapporo Japan
8. Department of Hematology Asahikawa City Hospital Asahikawa Japan
9. Department of Hematology Hakodate Municipal Hospital Hakodate Japan
10. Department of Hematology Sapporo Kosei General Hospital Sapporo Japan
11. Department of Hematology Obihiro Kosei Hospital Obihiro Japan
12. Department of Hematology National Hospital Organization Hokkaido Cancer Center Sapporo Japan
13. Department of Hematology Kin‐ikyo Chuo Hospital Sapporo Japan
14. Department of Hematology Teine Keijinkai Hospital Sapporo Japan
15. Department of Hematology Sapporo Medical University Sapporo Japan
16. Department of Hematology and Oncology Iwate Medical University Yahaba Japan