Affiliation: | 1. Department of Hematology, Chiba University Hospital, Chiba, Japan;2. Department of Transfusion Medicine and Cell Therapy, Chiba University Hospital, Chiba, Japan;3. Department of Pathology, Chiba University Hospital, Chiba, Japan;4. Department of Virology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan;5. Department of Pediatrics and Developmental Biology, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan |