1. Research Division, Medicine Faculty, Sleep Disorder Clinic, National Autonomous University of Mexico UNAM, Ciudad de Mexico, Mexico
2. Master's and Doctoral Program in Medical, Dental and Health Sciences, Faculty of Medicine, National Autonomous University of Mexico UNAM, Ciudad de Mexico, Mexico
3. Continuing Education and Innovation Division, National School of Higher Education, Leon Unit, National Autonomous University of Mexico UNAM, Leon, Guanajuato, Mexico