1. Academic Unit of Chemical and Biological Sciences, University of Guerrero, Chilpancingo Guerrero, Mexico
2. National School of Biological Sciences, National Polytechnic Institute, Mexico City, Mexico
3. Centers for Infectious Disease Research, National Institute of Public Health, Cuernavaca, Morelos, Mexico
4. General Hospital of Acapulco, Secretary of Health Guerrero, Acapulco Guerrero, Mexico