1. Stroke Research Programme, Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia
2. Radiology Department, Geelong Hospital, Geelong, Vic., Australia
3. Stroke Unit, The Queen Elizabeth Hospital, Woodville, SA, Australia
4. Stroke Research Programme, The Queen Elizabeth Hospital, Woodville, SA, Australia
5. Stroke Research Programme, Neurology Department, The Queen Elizabeth Hospital, Woodville, SA, Australia