1. Thunder Bay Regional Health Sciences Centre, Department of Cardiology, Northern Ontario School of Medicine University (NOSMU), Thunder Bay, ON, Canada
2. Wellington Hospital, Department of Medicine, University of Otago Wellington, Wellington, New Zealand
3. Cleveland Clinic, Department of Thoracic and Cardiovascular Surgery, Cleveland, OH, USA
4. Libin Cardiovascular Institute, Cumming School of Medicine, Calgary, AB, Canada
5. Nepean Hospital, Department of Cardiology, University of Sydney, Sydney, NSW, Australia