1. Section of Cardiology, John W. Deming Department of Medicine (P.S., S.S., T.Y., Y.H., S.D., P.D.), Tulane University School of Medicine, New Orleans, LA.
2. Department of Physiology (P.S., S.S., T.Y., Y.H., S.D., P.D.), Tulane University School of Medicine, New Orleans, LA.
3. Research Service, Harry S. Truman Memorial Veterans’ Hospital, Columbia, MO (B.C.).
4. Department of Medical Pharmacology and Physiology, University of Missouri, Columbia (B.C.).
5. Department of Pathology (D.T.), Tulane University School of Medicine, New Orleans, LA.
6. Loyola University, New Orleans, LA (V.R.-L.).
7. Department of Pharmacology (P.D.), Tulane University School of Medicine, New Orleans, LA.