1. Department of Immunology, Faculty of Medicine, Universidad Autónoma de Nuevo León, Monterrey, Mexico.
2. Center of Research, Prevention and Treatment of Respiratory Diseases (CIPTIR), University Hospital, Universidad Autónoma de Nuevo León Monterrey, Mexico.
3. Department of Microbiology, Center of Basic Science, Universidad Autónoma de Aguascalientes, Aguascalientes, Mexico.