1. Department of Hematology; Kobe City Hospital Organization Kobe City Medical Center General Hospital; Kobe Japan
2. Department of Hematology; Otemae Hospital; Osaka Japan
3. Research Institute for Radiation Biology and Medicine; Hiroshima University; Hiroshima Japan
4. Department of General Internal Medicine; Kumamoto University; Kumamoto Japan
5. Department of Hematology and Oncology; Osaka University; Suita Japan