1. Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
2. Department of Orthopedic Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
3. Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Taipei, Taiwan
4. Department of Biomedical Research, Mackay Memorial Hospital, Tamshui Taipei County, Taiwan
5. Department of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei, Taiwan