1. Department of Hematology Fukushima Medical University Hospital Fukushima Japan
2. Department of Hematology and Oncology Tokai University Tokyo Japan
3. Department of Hematology Hokkaido University Hospital Sapporo Japan
4. Department of Hematology Osaka City General Hospital Osaka Japan
5. Department of Hematology and Oncology University of Fukui Hospital Fukui Japan
6. Department of Hematology and Rheumatology Kindai University Hospital Osaka‐Sayama Japan
7. Department of Hematology Chugoku Central Hospital Fukuyama Japan
8. Department of Hematology, National Hospital Organization Kyushu Medical Center Fukuoka Japan
9. Department of Medicine and Biosystemic Science Faculty of Medicine Kyushu University Fukuoka Japan
10. Sumitomo Pharma Co., Ltd. Tokyo Japan
11. Department of Hematology, Atomic Bomb Disease and Hibakusha Medicine Unit, Atomic Bomb Disease Institute Nagasaki University Nagasaki Japan
12. Department of Hematology, Saitama Medical Center Saitama Medical University Saitama Japan