1. Mental Health Drug and Alcohol Services, Northern Sydney Local Health District, Wicks Road, North Ryde, NSW 2113, Australia
2. Faculty of Health, University of Technology Sydney, 235 Jones Street, Ultimo, NSW 2007, Australia
3. Faculty of Health, University of Canberra, 11 Kirinari Street, Bruce, ACT 2617, Australia
4. Hornsby and Kuringai Hospital, Mental Health Intensive Care Unit, Northern Sydney Local Health District, Palmerston Road, Hornsby, NSW 2077, Australia