1. Division of Cardiology, University of Colorado Anschutz Medical Campus, Aurora (V.K., P.N.P., P.M.H., F.A.M.).
2. Division of Cardiology, Saint Luke’s Mid America Heart Institute/UMKC, Kansas City, MO (J.A.S., K.F.K., S.V.A.).
3. Division of Cardiology at Massachusetts General Hospital, Harvard Medical School, Boston (J.H.W.).
4. Yale University School of Medicine, New Haven, CT (J.P.C.).
5. Division of Cardiology, Minneapolis Heart Institute (S.M.B.).
6. Washington University School of Medicine, St Louis, MO (A.P.A.).