1. From the Departments of Internal Medicine (Y.L., H.L., D.D.G.), Biophysics (H.Z., B.K.), and Surgery (A.C.N.), Free Radical Research Center (H.Z., B.K.) and Cardiovascular Center (Y.L., H.L., D.D.G.), Medical College of Wisconsin; Zablocki VA Medical Center (Y.L., D.D.G.), Milwaukee, Wis.