1. Department of Orthopedics, Mayo Clinic, Rochester, MN, USA
2. Department of Neurosurgery & Brain Repair, University of South Florida, Tampa, FL, USA
3. Center for Neuromusculoskeletal Research, University of South Florida, Tampa, FL, USA
4. United States Olympic & Paralympic Committee, Colorado Springs, CO, USA
5. United States Army Research Institute of Environmental Medicine, Natick, MA, USA
6. Department of Orthopaedics, The Ohio State University, Columbus, OH, USA