1. Harry S. Truman Memorial Veterans’ Hospital (L.R.F., S.L.E.), Columbia, Missouri 65212
2. Departments of Pharmacology, Pathology and Anatomical Sciences, Physiology, and Biochemistry, School of Medicine and the Molecular Biology Program, Missouri University (L.R.F., S.L.E., X.F., R.M.L., Y.W., L.M.R., D.T.C., R.H.F., W.J.K.), Columbia, Missouri 65212