1. Diabetes and Cardiovascular Center (C.M., V.G.D., A.R.A., I.M., M.G., J.H.,. M.R.H., J.R.S.), Columbia, Missouri 65201
2. Medical Pharmacology and Physiology (V.G.D., J.R.S.), Columbia, Missouri 65201
3. Departments of Internal Medicine (C.M., V.G.D., A.R.A., I.M., M.G., J.H., M.R.H., J.R.S.), Columbia, Missouri 65201
4. University of Missouri, Columbia, Missouri 65212 and Harry S. Truman Veterans' Administration Medical Center (J.R.S.), Columbia, Missouri 65201