1. Department of Cardiovascular Medicine (A.U.F., J.J.M., E.A.K., B.A.B., R.P.F., M.M.F.)
2. Department of Laboratory Medicine and Pathology (A.U.F., W.D.E., J.J.M.)
3. Division of Pulmonary and Critical Care Medicine (H.M.D.)
4. Division of Biomedical Statistics and Informatics (S.M.J.), Mayo Clinic, Rochester, MN.