1. Laboratory of Molecular Biology, Northeast Biomedical Research Centre, Mexican Social Security Institute, Monterrey 64720, Mexico
2. Laboratory of Immunogenetics, Northeast Biomedical Research Centre, Mexican Social Security Institute, Monterrey 64720, Mexico
3. Laboratory of Molecular Microbiology, Northeast Biomedical Research Centre, Mexican Social Security Institute, Monterrey 64720, Mexico
4. Laboratory of Molecular Research of Diseases, Northeast Biomedical Research Centre, Mexican Social Security Institute, Monterrey 64720, Mexico
5. Medical Epidemiological Assistance Coordination of the State of Nuevo León, Mexican Social Security Institute, Monterrey 64000, Mexico