1. Department of Biomedical Engineering; National Cheng Kung University; 1 University Road Tainan 701 Taiwan
2. Medical Device Innovation Center; National Cheng Kung University; Tainan Taiwan
3. Department of Occupational Therapy; National Cheng Kung University; Tainan Taiwan
4. Department of Orthopaedics; National Cheng Kung University Hospital; Tainan Taiwan
5. Department of Computer Science and Information Engineering; National Cheng Kung University; Tainan Taiwan