1. Inherited Arrhythmia Clinic and the Arrhythmia Research Laboratory; University of Ottawa Heart Institute; Ottawa; Ontario; Canada
2. Department of Genetics, University Medical Center Groningen; University of Groningen; Groningen; the Netherlands
3. Department of Pediatrics, The Children's Hospital of Eastern Ontario; University of Ottawa; Ottawa; Ontario; Canada
4. Department of Cardiology, University Medical Center Groningen; University of Groningen; Groningen; the Netherlands
5. Department of Medical Genetics; University Medical Center Utrecht; Utrecht; the Netherlands
6. Division of Cardiology, Inherited Arrhythmia Clinic; The Childrens Hospital of Eastern Ontario; Ottawa; Ontario; Canada