1. Laboratory of Medical and Environmental Microbiology, Department of Medicine, Autonomous University of the State of Mexico, Toluca 50180, Mexico
2. Division of Clinical Research, Instituto Nacional deCancerología (INCan), SS, Mexico City, Mexico
3. Coordination of Health Research State of Mexico (West Regional Delegation), Instituto Mexicano del Seguro Social, State of Mexico, Mexico
4. Unit of Dysplasia of the Obstetrics Gynecology Hospital of the IMSS, State of Mexico, Mexico
5. Department of Biological Systems, Autonomous Metropolitan University-Xochimilco 04960, Mexico