1. Department of Haematology and Oncology; Graduate School of Medicine; Kyoto University; Kyoto; Japan
2. Departments of Haematology and Pathology; Tochigi Cancer Centre; Utsunomiya; Japan
3. Haematology and Molecular Medicine Unit; Nagasaki University Graduate School of Biomedical Sciences; Atomic Bomb Disease Institute; Nagasaki; Japan
4. Department of Pathology; Kurume University School of Medicine; Kurume; Japan
5. Multi-institutional Clinical Trial Support Centre; National Cancer Centre; Tokyo; Japan