1. From the Center for Complex Disease Genomics, Johns Hopkins University School of Medicine, Baltimore (J.M.T., A.Y.L., T.N.T., M.X.S., S.C., A.K., K.-D.H.N., C.B., A.C.); the Department of Genome Sciences, University of Washington School of Medicine (T.N.T., N.K., A.K., B.P.C., E.E.E.), and the Howard Hughes Medical Institute, University of Washington (E.E.E.) — both in Seattle; and Broad Institute of Harvard and MIT, Cambridge, MA (K.-D.H.N., N.G., S.G.).