4John D,Birkmeyer MD.Strategies for Improving Surgical Quality—Checklists and Beyond. The New England Journal of Medicine . 2010
5de Vries EN,Prins HA,Crolla RMPH,et al.Effect of a comprehensivesurgical safety system on patient outcomes. The New England Journal of Medicine . 2010
6Weiser T G,Regenbogen S E,Thompson K Det al.An estima-tion of the global volume of surgery:a modelling strategy based onavailable data. The Lancet . 2008
7Bickler,SW,Sanno-Duanda,B.Epidemiology of paediactric surgical admissions to a government referral hospital in the Gambia. Bulletin of the World Health Organization . 2000
8Gawande AA,Thomas EJ,Zinner MJ et al.The incidence and nature of surgical adverse events in Colorado and Utah in 1992. Journal of Surgery . 1999
9WHO’s patient-safety checklist for surgery. The Lancet . 2008