1. Department of Pediatrics, Asahikawa Medical University, Asahikawa, Japan
2. Department of Immunopathology, Asahikawa Medical University, Asahikawa, Japan
3. Department of Chemistry, Nara Medical University, Kashihara, Japan
4. Research and Development Department, Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, Tokyo, Japan
5. Japanese Red Cross Hokkaido Block Blood Center, Sapporo, Japan