1. From the Center for Intelligent Imaging (Ci2), Department of Radiology & Biomedical Imaging, University of California San Francisco, 505 Parnassus Ave, San Francisco, CA 94143 (E.C., J.E.V.M., J.D.R., A.M.R., S.C., J.T.M., C.P.H.); and Center for Biomedical Image Computing and Analytics (CBICA), University of Pennsylvania, Philadelphia, Pa (U.B., S.B.).