1. South Australian Institute of Ophthalmology, The University of Adelaide and Royal Adelaide Hospital, Adelaide
2. Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, The University of Adelaide and Royal Adelaide Hospital, Adelaide
3. Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, The University of Adelaide and Royal Adelaide Hospital, Adelaide3Clinical Trial Service Unit and Epidemiological Studies Unit, University of Oxford, Oxford, England