1. Goldratt E . Theory of constraints. Croton-on-Hudson, NY: North River, 1990.
2. Hollnagel E , Wears RL , Braithwaite J . From Safety-I to Safety-II: A White Paper. The Resilient Health Care Net: Published simultaneously by the University of Southern Denmark, University of Florida, USA, and Macquarie University, Australia, 2015.
3. Kohn LT , Corrigan JM , Donaldson MS . To err is human: building a safer health system. Washington: National Academy Press, 2000.
4. Department of Health. An organisation with a memory, 2000. http://patientsafety.health.org.uk/resources/organisation-memory (accessed 13 Dec 2015).
5. Trends in healthcare incident reporting and relationship to safety and quality data in acute hospitals: results from the National Reporting and Learning System