1 From the Departments of Clinical Neurosciences and Radiology and Hotchkiss Brain Institute (S.B.C.), University of Calgary, Canada; and the Department of Neurology (K.M.B.), Mayo Clinic, Jacksonville, FL. scoutts@ucalgary.ca.
2 From the Departments of Clinical Neurosciences and Radiology and Hotchkiss Brain Institute (S.B.C.), University of Calgary, Canada; and the Department of Neurology (K.M.B.), Mayo Clinic, Jacksonville, FL.