1. From the Neurological Intensive Care Unit (Y.B.A., J.T., M.R.A.) and Department of Radiology (K.A.R.), Montreal Neurological Institute and Hospital, McGill University, Quebec, Canada; Faculty of Medicine (Y.B.A.), Health Sciences Center, Kuwait University; and Department of Epidemiology, Biostatistics and Occupational Health (K.T.M.), McGill University, Montreal, Quebec, Canada.