1. Department of General Practice; The University of Melbourne; Melbourne Australia
2. Faculty of Health and Life Sciences; Coventry University; Coventry UK
3. National Addiction Centre, Institute of Psychiatry, Psychology and Neuroscience; King's College London; London UK
4. Addiction Research Group; IMIM-Institut Hospital del Mar d’Investigacions Mèdiques; Barcelona Spain
5. The Judith Lumley Centre; La Trobe University; Melbourne Australia
6. Centre for Academic Primary Care, Population Health Sciences, Bristol Medical School; University of Bristol; Bristol UK
7. The Royal Women's Hospital; Victoria Australia