2) American Society of Anesthesiologists (ASA) : Anesthesia Fast Facts. (http://www.asahq.org/For-the-Public-and-Media/Press-Room/Anesthesia-Fast-Facts.aspx) accessed 03/11/2011
3) Sentinel Event Alert: Preventing, and managing the impact of, anesthesia awareness. The Joint Commission, Oakbrook Terrace, IL, 2004. (http://www.jointcommission.org/assets/1/18/SEA_32.PDF) accessed 03/11/2011
4) Brown EN, Lydic R, Schiff ND: General anesthesia, sleep, and coma. N Engl J Med 363: 2638-2650, 2010
5) Sebel PS, Bowdle TA, Ghoneim MM, et al.: The incidence of awareness during anesthesia: a multicenter United States study. Anesth Analg 99: 833-839, 2004