1. Orthopaedic Institute of Southern Illinois, Herrin, IL, USA.
2. Colorado Joint Replacement, Denver, CO, USA.
3. Department of Biomedical Engineering, University of Tennessee, Knoxville, TN, USA.
4. Department of Bioengineering, University of Denver, Denver, CO, USA.
5. Department of Orthopaedics, University of Colorado School of Medicine, Denver, CO, USA.