1. From the Cardiology Department (N.B., J.R., M.C., D.L., B.M., L.S., A.R., M.G., P.B., M.T., L.S., V.G.), Centro Hospitalar de Gaia/Espinho, Vila Nova de Gaia, Portugal; Kings College London (A.M.T.), United Kingdom; and Ohio State University (S.R.), Columbus, Ohio.