1. Internal Medicine Department, “Dr. José Eleuterio González” University Hospital and School of Medicine, Universidad Autónoma de Nuevo León, Avenida Francisco I. Madero pte. y Avenida Gonzalitos s/n, Colonia Mitras Centro, 64460 Monterrey, NL, Mexico
2. Research Division, School of Medicine, Universidad Autónoma de Nuevo León, Avenida Francisco I. Madero pte. y Avenida Gonzalitos s/n, Colonia Mitras Centro, 64460 Monterrey, NL, Mexico