1 From the Department of Neurology (A.H.), McGill University, Montreal, Canada; and Department of Neurology (A.Z.C.), Mayo Clinic, Phoenix, AZ. adil.harroud@mail.mcgill.ca.
2 From the Department of Neurology (A.H.), McGill University, Montreal, Canada; and Department of Neurology (A.Z.C.), Mayo Clinic, Phoenix, AZ.