1. Division of Gene Regulation; Institute for Advanced Medical Research; Keio University School of Medicine; Tokyo Japan
2. Department of Neurosurgery; Kobe University Graduate School of Medicine; Kobe Hyogo Japan
3. Department of Neurosurgery; Nagoya University School of Medicine; Nagoya Japan
4. Division of Cancer Biology; Nagoya University Graduate School of Medicine; Nagoya Japan
5. Experimental Animal Facility; Shizuoka Cancer Center Research Institute; Sunto-gun Shizuoka Japan
6. Regional Resources Division; Shizuoka Cancer Center Research Institute; Sunto-gun Shizuoka Japan