1 Fiona Stanley Hospital, Department of Cardiology, Murdoch, Australia.
2 Fiona Stanley Hospital, Department of Cardiology, Murdoch, Australia; Harry Perkins Research Institute of Medical Research and The University of Western Australia, Crawley, Western Australia, Australia.
3 University of Ottawa Heart Institute, Department of Medicine (Cardiology), Ottawa, Ontario, Canada; Department of Radiology, University of Ottawa, Ottawa, Ontario, Canada. Electronic address: bchow@ottawaheart.ca.