1. Central Blood Institute, Japanese Red Cross Society Tokyo Japan
2. Department of Molecular Life Science Tokai University School of Medicine Kanagawa Japan
3. Kanto‐Koshinetsu Block Blood Center Japanese Red Cross Society Tokyo Japan
4. Discipline of Psychiatry, Medical School, The University of Western Australia Crawley WA Australia
5. Department of Hematology and Oncology Nagoya University Graduate School of Medicine Aichi Japan
6. Blood Service Headquarters, Japanese Red Cross Society Tokyo Japan