1. Department of Human Genetics, Graduate School of MedicineThe University of Tokyo Tokyo Japan
2. Department of Laboratory TestingJapanese Red Cross Tohoku Block Blood Center Miyagi Japan
3. Department of Cell Science, Institute of Biomedical SciencesFukushima Medical University Fukushima Japan
4. Department of Research and DevelopmentJapanese Red Cross Central Blood Institute Tokyo Japan
5. Department of Blood Transfusion and Transplantation ImmunologyFukushima Medical University Hospital Fukushima Japan
6. Blood Group SectionJapanese Red Cross Kanto‐Koshinetsu Block Blood Center Tokyo Japan