1. Washington State Institute for Public Policy; Olympia Washington USA
2. London School of Hygiene and Tropical Medicine; University of London; London UK
3. Institute for Medical Informatics, Biometry and Epidemiology; University of Munich; Munich Germany
4. Cochrane Public Health Review Group; University of Melbourne; Melbourne Australia
5. Institute of Population Health; University of Ottawa; Ottawa Ontario Canada
6. Central Regional Services, Queensland Health, Australia and School of Public Health; Queensland University of Technology; Kelvin Grove Australia
7. Central Regional Services; Queensland Health; Australia
8. Institute of Population Health and Department of Medicine; University of Ottawa, and Ottawa Hospital Research Institute; Ottawa Ontario Canada