Affiliation: | 1. Walter Reed National Military Medical Center, Department of Neurology, American Bldg, Bethesda, Maryland;2. Department of Physical Medicine & Rehab, Walter Reed National Military Medical Center, Bethesda, Maryland, USA;3. Department of Neurosurgery, Walter Reed National Military Medical Center, Bethesda, MD, USA;4. Department of Orthopedic Surgery, Walter Reed National Military Medical Center, Bethesda, MD, USA |