1. Department
of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan
2. Department of Materials Engineering, Tatung University, Taipei, Taiwan
3. Department of Orthopedic Surgery, National Taiwan University Hospital-Hsinchu Branch,
Hsinchu, Taiwan
4. Division
of Medical Engineering Research, National Health Research Institutes, Taipei, Taiwan
5. Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan