1. Division of Bioinformation and Therapeutic Systems National Defense Medical College Research Institute Tokorozawa Saitama Japan
2. Research and Development Department Cyberdyne, Inc Tsukuba Ibaraki Japan
3. Graduate School of Bio‐application and Systems Engineering Tokyo University of Agriculture and Technology Fuchu Tokyo Japan
4. Division of Basic Traumatology National Defense Medical College Research Institute Tokorozawa Saitama Japan