References
- The Task Force to Review Services for Drug Misusers. Report of an independent review of drug treatment services in England. Department of Health, London 1996
- Maynard A. Evidence-based medicine: an incomplete method for informing treatment choices. Lancet 1997; 349: 126–128
- National Health Data Committee. National health data dictionary, Version 5.0. Australian Institute of Health and Welfare, Canberra 1996