1. Drexel University, 2900 W. Queen Ln., Philadelphia, PA 19129, US
2. University of Tennessee Health Science Center, 910 Madison Ave., Memphis, TN 38163, US
3. Exponent, Inc., Philadelphia, PA, US
4. University of Tennessee-Campbell Clinic Dept. of Orthopaedic Surgery and Biomedical Engineering, 1211 Union Ave., Suite 510, Memphis, TN 38104, US