From the Division of Cardiovascular Diseases, Department of Internal Medicine (J.A.H., W.K., Z.W., R.E.K., R.M.W.), Department of Pharmacology (J.A.H.), Department of Veterans Affairs (J.A.H., K.Z., R.M.W.), Department of Surgery (M.K.), and Department of Anatomy and Cell Biology (R.L.D.), University of Iowa College of Medicine, Iowa City. (2000-06-20時点)