1. From the School of Medicine (A.C.Y., M.R.), Department of Radiology (C.B., S.P., S.D., M.A.G., V.G.), Department of Urology (L.E.P., W.T., R.A., V.G.), Department of Biomedical Engineering (Y.J., M.A.G., V.G.), Department of Epidemiology and Biostatistics (S.M., M.S.), and Department of Mathematics (D.M.), Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106.