1. Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Japan
2. Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Meguro, Japan
3. Japan Society for the Promotion of Science, Chiyoda, Japan
4. Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, Texas
5. Institute of Sports Medicine and Science, Tokyo International University, Kawagoe, Japan