1. Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (K.F.L., G.O., D.R.H., D.D.B.).
2. De Gasperis Cardio Center, Niguarda Hospital, Milano, Italy (E.A., C.C., F.O.).
3. Department of Cardiology, University of California–San Diego (E.D.A., K.N.H.).
4. Department of Cardiovascular Medicine, Mayo Clinic, Jacksonville, FL (L.T.C.).
5. Department of Cardiovascular and Thoracic Sciences, Fondazione Policlinico Universitario A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Roma, Italy (G.S., T.S.).
6. United Heart and Vascular Center, St Paul, MN (D.C.).
7. Cardiovascular Department, Association Socio Sanitary Territorial Santi Paolo e Carlo, Milano, Italy (A.C.).
8. Institute of Cardiology and Center of Excellence on Aging, G. d’Annunzio University, Chieti, Italy (A.P.).
9. Department of Cardiology, Pugliese-Ciaccio Hospital, Catanzaro, Italy (V.A.C.).