1. Division of Cardiovascular Medicine, Sarver Heart Center, University of Arizona, Tucson (K.B.).
2. Division of Cardiovascular Medicine, Yale School of Medicine, New Haven, CT (E.S.S.).
3. Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, MA (D.B.K., R.K.W.).
4. Division of General Internal Medicine, University of Pittsburgh School of Medicine, PA (U.R.E.).
5. Division of Cardiovascular Medicine, University of Colorado, Anschutz Medical Campus, Aurora (P.N.P., P.M.H.).
6. Division of Cardiology, Denver Health Medical Center, CO (P.N.P.).
7. Division of Cardiovascular Medicine, University of Michigan, Ann Arbor (B.K.N.).