1 Tokyo University of Agriculture and Technology, Department of Electrical Engineering and Computer Science, Nakacho, Koganei, Tokyo, Japan. t.j.ken.takiyama@gmail.com.
2 Tokyo University of Agriculture and Technology, Department of Electrical Engineering and Computer Science, Nakacho, Koganei, Tokyo, Japan.
3 Rehabilitation Engineering Laboratory, Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada.
4 The University of Tokyo, Department of Life Sciences, Graduate School of Arts and Sciences, Tokyo, Japan.