1. From the Department of Radiology, the Institute for Biomedical Informatics, and the Leonard Davis Institute of Health Economics, The University of Pennsylvania, Penn Medicine, 3400 Spruce St, Philadelphia, PA 19104 (K.S., C.E.K., M.D.S., M.A.R., H.M.Z., S.O.T., T.S.C.); and Valley Health, Winchester, VA (P.A.H.).