1. From the Stanford Center for Biomedical Informatics Research, Department of Medicine (M.Z., O.G.), Department of Radiology (A.L., S.E., A.G., S.K.P., D.L.R., S.N.), Division of Thoracic Surgery, Department of Cardiothoracic Surgery (J.B.S.), and Department of Pathology (K.C.J., G.J.B.), Stanford University, 1265 Welch Rd, Stanford, CA 94305-5479.