1 Psychiatry, Sydney Medical School - Northern, Royal North Shore Hospital, St Leonards, NSW, Australia; InforMH, Mental Health and Drug and Alcohol Office, NSW Health, North Ryde, NSW 1670, Australia. Electronic address: grant.sara@health.nsw.gov.au.
2 National Drug and Alcohol Centre, UNSW Australia, Randwick, NSW, Australia; Department of Psychiatry, UNSW Australia, Black Dog Institute, Randwick, NSW, Australia.