1. From the Department of Neurological Surgery (C.-J.C., J.S.K., T.J.B., M.S.P., M.Y.K.) and Division of Cardiovascular Medicine (M.R.), University of Virginia Health System, Charlottesville; Department of Neurological Surgery, University of Miami, FL (S.C., S.S., E.L., R.M.S.); Department of Neurosurgery, Barrow Neurological Institute, Phoenix, AZ (D.D.); Department of Neurosurgery, Auckland City Hospital, New Zealand (N.I.); and Department of Neurosurgery, Milton S. Hershey Medical Center, PA (K.C.L.).