1. From the Electrophysiology Section, Division of Cardiology (G.M.M.), Division of Nephrology (C.A.P.), and Department of Epidemiology and Biostatistics (E.V.), University of California, San Francisco; Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis (A.A.); Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada (G.L.); Cardiovascular Research Center (S.A.L., P.T.E.) and Cardiac Arrhythmia Service (P.T.E.), Massachusetts...