1. Department of Clinical Research, and Department of Diagnostic Pathology, National Hospital Organization Hakodate Hospital, Hakodate 041-8512, Japan
2. Department of Diagnostic Pathology, Kainan Hospital Aichi Prefectural Welfare Federation of Agricultural Cooperatives, Yatomi 498-8502, Japan
3. Department of Pathology, Japanese Red Cross, Nagasaki-Genbaku Hospital, Nagasaki 852-8511, Japan