1. Department of Mechanical and Production Engineering, Niigata University, Niigata, Japan
2. Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, Tokyo, Japan
3. Nippon Bunri University, Oita, Japan
4. Department of Mechanical System Design Engineering, HongIk University, Seoul, Korea
5. Analysis Center, Panasonic Corporation, Osaka, Japan
6. Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA