1. Department of Cardiology, Quebec Heart and Lung Institute, Laval University, Quebec City, Canada (J.W.-W., A.B., M.C., J.R.-C.).
2. Department of Cardiology, Toronto General Hospital, Ontario, Canada (E.H., M.O.).
3. Department of Cardiology, Montreal Heart Institute, Quebec, Canada (R.I.).
4. Department of Neurology, Hôtel Dieu de Lévis, Quebec City, Quebec, Canada (D.R.).
5. Department of Neurology, Centre Hospitalier Universitaire Georges L. Dumont, Moncton, New Brunswick, Canada (A.M.).
6. Department of Pediatric Cardiology, Centre Hospitalier Universitaire de Québec, Quebec City, Canada (C.H.).