1. Department of Neurology, Hospital Ángeles del Pedregal, Mexico City 10700, Mexico
2. Mexican Faculty of Medicine, Universidad La Salle, Mexico City 06140, Mexico
3. School of Medicine, Saint Luke Escuela de Medicina, Mexico City 11000, Mexico
4. Department of Neurosurgery, Centro Médico Nacional 20 de Noviembre ISSSTE, Mexico City 03104, Mexico
5. Department of Neurosurgery, ISSSTE Hospital Regional Lic. Adolfo López Mateos, Mexico City 01030, Mexico
6. Department of Neurosurgery, ISSSTE Hospital Regional 1° de Octubre, Mexico City 07760, Mexico
7. Department of Neurosurgery, Hospital ISSSTE Tláhuac, Mexico City 13273, Mexico
8. Department of Neurosurgery, Hospital Regional Dr. Valentín Gómez Farías-ISSSTE, Zapopan 45100, Mexico
9. Department of Neurosurgery, ISSSTE Hospital Regional Gral. Ignacio Zaragoza, Mexico City 09100, Mexico
10. Center of Health Sciences, University of Guadalajara, Guadalajara 44100, Mexico
11. Faculty of Health Sciences, Universidad Anáhuac México Norte, Naucalpan de Juárez 52786, Mexico
12. Hospital Ángeles del Pedregal, Mexico City 10700, Mexico