1. Population Health Research Institute, Hamilton, Ontario, Canada (A.P.B., J.W., W.F.M., J.A.W., S.J.C., J.S.H.).
2. Department of Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada (E.C.).
3. Cardiology Department, Health Sciences North, Sudbury, Ontario, Canada (M.S.).
4. Klinik für Innere Medizin–Kardiologie, Diabetologie and Nephrologie, Evangelisches Klinikum Bethel, Bielefeld, Germany (C.W.I.).
5. Division of Clinical Electrophysiology, Department of Cardiology, Johann Wolfgang Goethe University, Frankfurt, Germany (S.H.H.).
6. Department of Medicine, Medical University of South Carolina, Charleston (M.R.G.).