1. Association of Ambulance Chief Executives. Joint Royal Colleges Ambulance Liaison Committe (JRCALC) clinical guidelines 2019. Bridgwater: Class Professional Publishing; 2019
2. Beauchamp T, Childress J. Principles of biomedical ethics. 5th edn. New York: Oxford University Press; 2001
3. Bench S, Brown K. Critical care nursing learning from practice. 1st edn. London: Wiley-Blackwell; 2011