1. School of Medicine, University of Notre Dame, Darlinghurst, Australia
2. Department of Radiology, Royal North Shore Hospital, St Leonards, Australia
3. Accident and Emergency Department, Royal North Shore Hospital, St Leonards, Australia
4. Department of Radiology, Gold Coast University Hospital, Southport, Australia
5. Accident and Emergency Department, Manly Hospital, Manly, Australia
6. Accident and Emergency Department, Mona Vale Hospital, Mona Vale, Australia
7. Accident and Emergency Department, Gosford Hospital, Gosford, Australia