1. Cardiovascular Genetics Research Laboratory (J.L.T., R.S.S., T.M.O.), Mayo Clinic, Rochester, MN.
2. Division of Pediatric Cardiology, Department of Pediatric and Adolescent Medicine (T.N., D.J.H., T.M.O.), Mayo Clinic, Rochester, MN.
3. Division of Computational Biology, Department of Quantitative Health Sciences (Z.C.F.), Mayo Clinic, Rochester, MN.
4. Division of Clinical Trials and Biostatistics, Department of Quantiative Health Sciences (W.R.B.), Mayo Clinic, Rochester, MN.
5. Department of Cardiovascular Medicine (D.J.H., T.M.O.), Mayo Clinic, Rochester, MN.