1. From the School of Biomedical Engineering and Sciences and 2Virginia Tech–Wake Forest University Center for Injury Biomechanics, Winston-Salem, North Carolina; and
2. Center for Biomolecular Engineering, Wake Forest University School of Medicine, Winston-Salem, North Carolina;
3. Virginia Tech–Wake Forest University Center for Injury Biomechanics, Winston-Salem, North Carolina; and 4School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Viginia.