1. Department of Blood Transfusion and Transplantation Immunology; Fukushima Medical University; Fukushima Japan
2. Department of Cardiology and Hematology; Fukushima Medical University; Fukushima Japan
3. Japanese Red Cross Fukushima Blood Center; Fukushima Japan
4. Division of Pediatric Oncology; Cancer Center; Fukushima Medical University Hospital; Fukushima Japan