1. From Cardiovascular Genetics (S.C.H., P.N.H.), Department of Medicine, University of Utah, Salt Lake City; Myriad Genetics Inc, (K.B., M.T.M., T.L.T., B.B.W., D.G.B., M.H.S., M.E.S.), Salt Lake City, Utah; and Novartis Institute for Biomedical Research (B.R.B.), Summit, NJ.