1. Departments of Clinical Neurosciences, Community Health Sciences, Medicine, and Radiology, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada (M.D.H.).
2. Department of Neurology, Dell Medical School, University of Texas at Austin (S.W.).
3. Ascension Healthcare‚ St. Louis‚ MO (S.W.).
4. Department of Neurology, NYU Grossman School of Medicine, New York, NY (S.K.R.).
5. Bellevue Hospital‚ Manhattan‚ NY (S.K.R.).