Amado Jiménez-Ruiz1, Miguel García-Grimshaw2, José L Ruiz-Sandoval3. 1. Western University, Department of Neurology, Ontario, Canada, Mexico. 2. Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Department of Neurology, Mexico City, Mexico. 3. Hospital Civil de Guadalajara "Fray Antonio Alcalde", Department of Neurology, Jalisco, Mexico.