1. From the Diabetes and Cardiovascular Research Center (G.J., A.R.A., J.R.S.)
2. Research Service, Truman Memorial Veterans Hospital, Columbia, MO (G.H., A.R.A., J.R.S.).
3. Department of Medical Pharmacology and Physiology (M.A.H., J.R.S.), University of Missouri School of Medicine, Columbia
4. Dalton Cardiovascular Research Center, University of Missouri, Columbia (M.A.H., J.R.S.)