1. Monash Addiction Research Centre, Eastern Health Clinical School, Monash University, Melbourne, Australia
2. Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Melbourne, Australia
3. Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
4. Melbourne East General Practice Network (trading as Outcome Health), Surrey Hills, Australia
5. Department of General Practice, School of Primary and Allied Health Care, Monash University, Notting Hill, Melbourne, Australia