1. Registrar, Psychiatry, Metro South Addiction and Mental Health Service, Brisbane, QLD, Australia
2. Registrar, Psychiatry, Metro South Addiction and Mental Health Service, Brisbane, QLD, Australia, and; District General Hospital Trincomalee, Trincomalee, Sri Lanka
3. Professor, Psychiatry, Metro South Addiction and Mental Health Service, Brisbane, QLD, and; University of Queensland School of Medicine, Brisbane, QLD, Australia
4. Associate Professor, Psychiatry, Metro South Addiction and Mental Health Service, Brisbane, QLD, and; University of Queensland School of Medicine, Brisbane, QLD, Australia