1 Department of Medical Education, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico; Division of Postgraduate Studies, Faculty of Medicine, Universidad Nacional Autónoma de México, Mexico City, Mexico. Electronic address: isaac.nunezs@incmnsz.mx.
2 Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Mexico City, Mexico.
3 Subdirectorate of Hospital Epidemiology and Quality Control of Medical Attention, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Mexico City, Mexico.
4 Directorate-General for Epidemiology, Ministry of Health, Mexico City, Mexico.
5 Coordinating Commission of the National Institutes of Health and High Specialty Hospitals, Ministry of Health, Mexico City, Mexico.
6 Department of Infectious Diseases, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Mexico City, Mexico; Department of Neurology and Psychiatry, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán, Mexico City, Mexico; Institute of Bioelectronic Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA.