1. From the Department of Neurological Surgery (T.B., M.K., T.Y., T.M., A.K., T.S., N.T., F.W., Y.M., I.D.), Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan; the Department of Neurosurgery (T.B., M.M.), Tokai University, Kanagawa, Japan; and the Department of Neurosurgery (C.V.B.), University of South Florida College of Medicine, Tampa, Fla.