1 Division of Cardiology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada.
2 Division of Cardiology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; London Heart Rhythm Program, Division of Cardiology, London Health Sciences Centre, London, Ontario, Canada.
3 Division of Cardiology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; Heart Failure, Cardiac Rehabilitation & Secondary Prevention Program, Division of Cardiology, St Joseph's Health Care Centre, London, Ontario, Canada. Electronic address: robert.mckelvie@sjhc.london.on.ca.