1. Division of General Medicine, Department of Medicine, Nihon University School of Medicine, Tokyo 173‑0032, Japan
2. Department of Oncology, The 5th Hospital of Xiamen, Xiamen, Fujian 361101, P.R. China
3. Department of Pediatric Surgery, Nihon University School of Medicine, Tokyo 173‑0032, Japan
4. Division of Cell Regeneration and Transplantation, Department of Functional Morphology, Nihon University School of Medicine, Tokyo 173‑8610, Japan
5. Department of DNA Damage Signaling, Research Center, The 5th Hospital of Xiamen, Xiamen, Fujian 361101, P.R. China
6. Division of Oncologic Pathology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo 173‑0032, Japan