1. Anesthesia patient safety foundation. www.apsf.org
2. Donabedian A (2002) An introduction to quality assurance in health care. Oxford University Press, New York. 4 p
3. Centers for Medicare and Medicaid Services. www.cms.gov
4. National Research Council (US), Institute of Medicine (US) (2013) In: Woolf SH, Aron L (eds) U.S. Health in International Perspective: Shorter Lives, Poorer Health. National Academies Press (US), Washington DC
5. Kohn LT, Corrigan J, Donaldson MS (1999) To err is human: building a safer health system. Washington National Academy Press, Washington DC