1. Division of Pathological Biochemistry Department of Biomedical Sciences Faculty of Medicine Tottori University 86 Nishi‐cho Yonago Tottori 683‐8503 Japan
2. Chromosome Engineering Research Center Tottori University 86 Nishi‐cho Yonago Tottori 683‐8503 Japan
3. Division of Molecular and Cellular Medicine National Cancer Center Research Institute National Cancer Center Hospital 5‐1‐1 Tsukiji Chuo‐ku Tokyo 104‐0045 Japan
4. Orthopedics Division National Cancer Center Hospital 5‐1‐1 Tsukiji Chuo‐ku Tokyo 104‐0045 Japan