1. Department of Precision Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan.
2. The 22nd Century Medical and Research Center, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
3. Department of Orthopaedic Surgery, Teikyo University Mizonokuchi Hospital, Kawasaki, Japan.
4. Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan.
5. Department of Rehabilitation Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.