1. Professor, University of Queensland, School of Medicine, Herston, Australia; Professor, Departments of Community Health and Epidemiology, Dalhousie University, Halifax, Nova Scotia
2. Epidemiologist, Department of Health, Health Department of Western Australia, Perth, Australia
3. Professor, Centre for Child Health Research, The University of Western Australia, Perth, Australia
4. Analyst, Department of Health, Health Department of Western Australia, Perth, Australia