1. Department of Genetics, School of Bioanalysis, Faculty of Medicine, Universidad of Zulia, Maracaibo, Venezuela,
2. Dr. Américo Negrette Institute for Clinical Investigation, Faculty of Medicine, Universidad of Zulia, Maracaibo, Venezuela,
3. Department of Immunology, School of Bioanalysis, Faculty of Medicine, Universidad of Zulia, Maracaibo, Venezuela and
4. Institute for Investigation, Faculty of Odontology, Universidad of Zulia, Maracaibo, Venezuela