1. Department of Hematology, Atomic Bomb Disease and Hibakusha Medicine Unit Nagasaki University Graduate School of Biomedical Sciences Nagasaki Japan
2. Department of Hematology Nagasaki University Hospital Nagasaki Japan
3. Department of Hematology, Atomic Bomb Disease and Hibakusha Medicine Unit, Atomic Bomb Disease Institute Nagasaki University Nagasaki Japan
4. Department of Hematology Sasebo City General Hospital Sasebo Japan
5. Department of Hematology Japan Community Health care Organization Isahaya General Hospital Isahaya Japan
6. Department of Hematology National Hospital Organization Nagasaki Medical Center Omura Japan
7. Department of Hematology Japanese Red Cross Nagasaki Genbaku Hospital Nagasaki Japan