1. Department of Orthopedics; National Taiwan University Hospital and National Taiwan University College of Medicine; Taipei 10002 Taiwan
2. Institute of Biomedical Engineering, College of Medicine and Engineering, National Taiwan University; Taipei 10031 Taiwan
3. Department of Biomedical Engineering; Yuanpei University of Medical Technology; Hsinchu 30015 Taiwan
4. Department of Orthopedics; En Chu Kong Hospital; New Taipei City 23702 Taiwan
5. School of Dental Technology, College of Oral Medicine; Taipei Medical University; Taipei 11031 Taiwan