1. Biomedical Research Unit (F.G.-R., L.E.S.-M., M.R.-M.), Mexican Social Security Institute, 34000 Durango, Mexico
2. Research Group on Diabetes and Chronic Illnesses (F.G.-R., L.E.S.-M., M.R.-M.), 34000 Durango, Mexico
3. Medical Research Unit in Clinical Epidemiology (M.G.-O., E.M.-A., M.G.R.-Z., S.O.H.-G., O.J.-C.), Specialties Hospital, Medical Unit of High Specialty, West National Medical Center, Mexican Social Security Institute, 44380 Guadalajara, Mexico
4. Cardiovascular Research Unit (M.G.-O., E.M.-A.), Physiology Department, University of Guadalajara, 44340 Guadalajara, Mexico