1. Department of Biomedical Engineering National Cheng Kung University Tainan City 701 Taiwan
2. Medical Device Innovation Center National Cheng Kung University Tainan City 701 Taiwan
3. Department of Orthopedics National Cheng Kung University Hospital Tainan City 704 Taiwan
4. Department of Physical Medicine and Rehabilitation National Cheng Kung University Hospital Tainan City 704 Taiwan
5. Department of Occupational Therapy National Cheng Kung University Tainan City 701 Taiwan