1. From the Frazier Rehabilitation Institute (C.A.A., R.A.M., J.V., K.B., S.J.H.), and the Kentucky Spinal Cord Injury Research Center (C.A.A., M.B., Y.C., C.K.F., S.J.H.) and the Department of Neurosurgery, School of Medicine (M.B., R.A.M., J.V., K.B., Y.C., C.K.F., S.J.H.), University of Louisville — all in Louisville, KY.