1. Department of Neuroradiology; National Institute of Neurology and Neurosurgery Manuel Velasco Suárez; Distrito Federal México
2. Department of Neurology; National Institute of Neurology and Neurosurgery Manuel Velasco Suárez; Distrito Federal México
3. Department of Neurology; Hospital Universitario José Eleuterio González; Universidad Autónoma de Nuevo León; Monterrey México
4. Department of Infectious Diseases; Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez; Distrito Federal México
5. School of Medicine; Universidad de Especialidades Espíritu Santo; Guayaquil Ecuador