1. Department of Pathology, School of Medicine Autonomous University of Nuevo Leon Ave. Madero y Dr. Eduardo Aguirre P. Monterrey Nuevo León 64460 Mexico
2. Department of Analytical Chemistry, School of Medicine Autonomous University of Nuevo Leon Ave. Madero y Dr. Eduardo Aguirre P. Monterrey Nuevo León 64460 Mexico
3. Department of Physiology, School of Dentistry Autonomous University of Nuevo Leon Dr. Eduardo Aguirre P. y Silao Monterrey Nuevo León 64460 Mexico
4. Department of Histology, School of Medicine Autonomous University of Nuevo Leon Ave. Madero y Dr. Eduardo Aguirre P. Monterrey Nuevo León 64460 Mexico