1. Department of Diagnostic Pathology, Keiyu Hospital, Yokohama, Kanagawa, Japan,
2. Department of Hematology, Keiyu Hospital, Yokohama, Kanagawa, Japan,
3. Department of Surgery, Keiyu Hospital, Yokohama, Kanagawa, Japan,
4. Department of Pathological Diagnostics, Tokai University School of Medicine, Isehara, Kanagawa, Japan