1. Institute for Scientific Research “Dr. Roberto Rivera-Damm”, Juárez University of Durango State, Durango, Mexico
2. Clínica de Medicina Familiar, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Durango, Mexico
3. Biomedical Research Laboratory, Faculty of Medicine and Nutrition, Juárez University of Durango State, Durango, Mexico