1. Department of Hematology and Clinical Immunology, Yokohama City University School of Medicine, Yokohama, Japan
2. Department of Transfusion and Cell Therapy, Yokohama City University Hospital, Yokohama, Japan
3. Department of Laboratory Medicine, Yokohama City University Hospital, Yokohama, Japan
4. Department of Hematology, Fujisawa Municipal Hospital, Fujisawa, Japan