1. a School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, VA 24061, USA
2. b Department of Orthopaedic Surgery, University of Connecticut, Storrs, CT 06269, USA
3. c Department of Orthopaedic Surgery, University of Connecticut, Storrs, CT 06269, USA
4. d School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, VA 24061, USA
5. e Department of Orthopaedic Surgery, University of Connecticut, Storrs, CT 06269, USA; Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA