17. Brennan, Troyen A.; Leape, Lucian L.; Laird, Nan M, et al. Incidence of Adverse Events and Negligence in Hospitalized Patients. N Eng J Med. 324(6):370–376, 1991. See also: Thomas, Eric J.; Studden, David M.; Newhouse, Joseph P., et al. Costs of Medical Injuries in Utah and Colorado. Inquiry. 36:255–264, 1999.