1. McMaster University, Population Health Research Institute, Hamilton Health Sciences, Hamilton, Canada
2. Southlake Regional Health Centre, Newmarket, Canada
3. Asklepios Klinik St Georg, Hamburg, Germany
4. Ottawa Heart Institute, Ottawa, Canada
5. Universite Laval, Quebec, Canada
6. Victoria Cardiac Arrhythmia Trials Inc, Victoria, Canada
7. St Davids Medical Center, Austin, Texas