1. Department of Cardiovascular Medicine St. Mary's Hospital Kurume Japan
2. Department of Pathology National Cerebral and Cardiovascular Center Suita Japan
3. Department of Viral Pathogenesis and Controls National Center for Global Health and Medicine Ichikawa Japan
4. Department of Pathology National Institute of Infectious Disease Tokyo Japan
5. Department of Blood Transfusion Medicine Nara Medical University Nara Japan