Department of Pharmacology and Toxicology, University of Mississippi Medical Center. Jackson, Mississippi (C.Z., X.H., S.R.M., H.Z., S.W., Y.G., W.G., J.M.W., R.J.R., F.F.); Department of Urology, Zhongshan Hospital, Fudan University. Shanghai, China (C.Z., W.G.); and Department of Physiology, Medical College of Wisconsin. Milwaukee, Wisconsin (A.M.G.).