1. Department of Hematology and Oncology Takatsuki Red Cross Hospital Osaka Japan
2. Department of Hematology and Oncology Graduate School of Medicine Kyoto University Kyoto Japan
3. Department of Diagnostic Pathology Kyoto University Hospital Kyoto Japan
4. Department of Diagnostic Pathology Takatsuki Red Cross Hospital Osaka Japan
5. Center for Infectious Disease Risk Management National Institute of Infectious Diseases Tokyo Japan