1. Mayo Clinic Graduate School of Biomedical Sciences, Department of Molecular Pharmacology and Experimental Therapeutics (T.N.T.), Mayo Clinic, Rochester, MN.
2. Cardiovascular Genetics Research Laboratory (T.N.T., J.L.T., R.S.S., T.M.O.), Mayo Clinic, Rochester, MN.
3. Division of Biomedical Statistics and Informatics, Department of Health Sciences Research (J.M.E., M.M.O.), Mayo Clinic, Rochester, MN.
4. Department of Cardiovascular Medicine (R.G., M.S.T., S.N.H., T.M.O.), Mayo Clinic, Rochester, MN.
5. Division of Pediatric Cardiology, Department of Pediatric and Adolescent Medicine (T.M.O.), Mayo Clinic, Rochester, MN.