1. Laboratory of Research in Metabolic and Infectious Diseases, Multidisciplinary Academic Division of Comalcalco, Juarez Autonomous University of Tabasco, Comalcalco City, Tabasco, Mexico
2. Laboratory of Epigenetics, Division of Basic Research, National Cancer Institute of Mexico, Mexico City, Mexico
3. Laboratory of Epidemiology and Molecular Biology of Oncogenic Virus Division of Basic Research, National Cancer Institute of Mexico, Mexico City, Mexico