1. Department of Biomechatronic Engineering, National Chiayi University, Chiayi City, Taiwan
2. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
3. Biomedical Technology and Device Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan
4. Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli, Taiwan
5. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu, Taiwan