1. Faculty of Medicine, Department of Physiology, Université de Montréal, Quebec, Canada;
2. Centre de Recherche, Hôpital du Sacré-Coeur, Montréal, Quebec, Canada;
3. Neurocardiology Research Center of Excellence, University of California Los Angeles, Los Angeles, California; and
4. Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee;
5. Cardiac Arrhythmia Center, University of California Los Angeles, Los Angeles, California