1. Primary Care Research Unit, Department of General Practice, University of Melbourne, Melbourne, VIC.
2. Addiction and Substance‐Related Disorder Research Group, Municipal Institute of Medical Research, Barcelona, Spain.
3. Discipline of General Practice, University of Newcastle, Newcastle, NSW.
4. Swin‐PsyCHE Research Unit, Department of Psychology, Swinburne University of Technology, Melbourne, VIC.
5. ORYGEN Research Centre, Department of Psychiatry, University of Melbourne, Melbourne, VIC.