1. From the Department of Neurosurgery (W.L.T.), Department of Nursing and Patient Services, Shands Hospital (J.A., J.H., P.G.), Speech, Language, and Hearing Sciences (A.F.), Department of Neurology (M.F.W.), and Department of Neuroscience (M.F.W.), University of Florida, Gainesville, FL; Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); and Harvard School of Public Health, Boston, MA (W.L.T.).