1. Faculty of Medicine; School of Clinical Medicine, The University of Queensland; Brisbane Queensland Australia
2. Emergency and Trauma Centre; Royal Brisbane and Women's Hospital; Brisbane Queensland Australia
3. Department of Community and Family Medicine, College of Medicine; University of Sharjah; Sharjah United Arab Emirates
4. Faculty of Health, School of Public Health and Social Work; Queensland University of Technology; Brisbane Queensland Australia
5. Kenneth G Jamieson Department of Neurosurgery; Royal Brisbane and Women's Hospital; Brisbane Queensland Australia