1. Research Unit, Central Sydney Area Mental Health Service (CSAMHS), PO Box 1, Rozelle, New South Wales, 2039, Australia
2. Department of Psychological Medicine, University of Sydney and CSAMHS, Sydney, Australia
3. Thomas Walker Hospital (‘Rivendell’) and Child, Adolescent and Family Mental Health Services, CSAMHS, and Discipline of Psychological Medicine, University of Sydney, Sydney, Australia