1. From the Departments of Internal Medicine (W.G.L., D.G., X.L., S.G., L.L.S., M.L.M., C.D.S., N.L.W.) and Surgery (L.W.) and the Free Radical and Radiation Biology Program (M.L.M., N.L.W.), University of Iowa, Iowa City; Veterans Affairs Medical Center, Iowa City, Iowa (N.L.W.); and Institute of Cardiovascular Disease Research, First Hospital of Peking University, and Department of Physiology, Health Science Center of Peking University, Beijing, People’s Republic of China (C.T.).