1. Department of Diagnostic Pathology Nara Medical University 840 Shijo, Kashihara Nara 643‐8522 Japan
2. Department of Cardiovascular Medicine Nara Medical University 840 Shijo Kashihara Nara 634‐8522 Japan
3. Department of Pathology Suzuka General Hospital 1275‐53 Yasuduka Suzuka Mie 513‐8630 Japan
4. Department of Pathology National Cerebral and Cardiovascular Center 6‐1 Kishibe‐Shimmachi Suita Osaka 564‐8565 Japan