1. From the Departments of Neurology (A.Z., M.F., A.I., M.R., L.M.), University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque
2. Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston (S.A.Q.)
3. Radiology (B.L.H., M.C.M.), University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque
4. Harvard University, Cambridge, MA (C.V.)
5. Department of Medicine and Cardiovascular Institute, University of Pennsylvania, Perelman School of Medicine, Philadelphia (A.T.T., M.L.K.)
6. Neurosurgery (H.Y.), University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque
7. Department of Neurosurgery, Barrow Neurological Institute, Phoenix, AZ (M.T.L.)
8. Department of Anesthesia and Perioperative Care and Department of Epidemiology and Biostatistics, University of California San Francisco (H.K.).