1. Division of Blood Transfusion, Toho-University Medical Center Omori Hospital
2. Laboratory Medicine, Tokyo Medical University Hachioji Medical Center
3. Japan Red Cross Hokkaido Block Blood Center
4. Department of Blood Transfusion, The University of Tokyo Hospital
5. Department of Blood Transfusion, Nagoya University Hospital
6. Faculty of Medical Technology, Health Sciences University of Hokkaido
7. Faculty of Medical Science, Fujita Medical University
8. Department of Blood Transfusion, Nara Medical University Hospital