1. Department of Medical Oncology, Kobe City Medical Center General Hospital, Kobe City Hospital Organization, Kobe, Hyogo 650-0047, Japan
2. Department of Hematology, Kobe City Medical Center General Hospital, Kobe City Hospital Organization, Kobe, Hyogo 650-0047, Japan
3. Department of Pathology, Kobe City Medical Center General Hospital, Kobe City Hospital Organization, Kobe, Hyogo 650-0047, Japan