1. From the University of Southern California (P.T.) and the University of California, Los Angeles (D.J.B.) — both in Los Angeles; Geisinger Health System, Danville, PA (M.N.M.); the National Bureau of Economic Research (N.W., D.C., D.J.B., D.L.), Harvard University (E.H., S.H., D.L.), and the Broad Institute of Harvard and MIT (A.R.M., B.M.N., H.L.R., S.H.) — all in Cambridge, MA; Massachusetts General Hospital (A.R.M., B.M.N., H.L.R.), Harvard Medical School (A.R.M., B.M.N., H.L.R., L.W.-H.), and Brigham...