%0 Journal Article %B N Engl J Med %D 2009 %G eng %N 14 %P 1368-75 %R 10.1056/NEJMsa0903048 %T Variation in hospital mortality associated with inpatient surgery. %V 361 %1 https://www.ncbi.nlm.nih.gov/pubmed/19797283 %8 10/2009