1. Division of Oncologic Pathology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo 173‑8610, Japan
2. Department of Pathology and Clinical Laboratories, National Cancer Center Hospital East, Kashiwa, Chiba 277‑8577, Japan
3. Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, Tokyo 173‑8610, Japan