1. Flinders University, College of Nursing and Health Sciences, Sturt Campus, University Drive, Bedford Park 5042, Australia
2. Monash University, School of Public Health, St Kilda Road, Melbourne 3004, Australia
3. University Adelaide, Centre for Heart Rhythm Disorders, North Tce, Adelaide 5005, Australia
4. Department of Cardiology, Royal Adelaide Hospital, North Tce, Adelaide 5000, Australia