1. BeckerEL Lord Butterfield HarveyAM HeptinstallRH ThomasL. comps. Churchill's Medical Dictionary 1st edn. London: Churchill Livingstone 1989.
2. Intensive Care Society.The Intensive Care Service in the UK. London: Intensive Care Society 1990.
3. Association of Anaesthetists.The High Dependency Unit — Acute Care in the Future. London: Association of Anaesthetists 1991.
4. Department of Health.Guidelines on Admission to and Discharge from Intensive Care and High Dependency Units. London: Department of Health 1996.
5. MetcalfeA&McPhersonK.Study of Provision of Intensive Care in England 1993. London: Department of Health 1995.