1. Department of Kinesiology, The Pennsylvania State University, University Park, Pennsylvania.
2. Department of Bioengineering, The Pennsylvania State University, University Park, Pennsylvania.
3. Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania.
4. National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland.
5. Department of Neurosurgery, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylania.