%0 Journal Article %B Health Aff (Millwood) %D 2011 %G eng %N 4 %P 581-589 %R 10.1377/hlthaff.2011.0190 %T 'Global trigger tool' shows that adverse events in hospitals may be ten times greater than previously measured. %V 30 %1 https://www.ncbi.nlm.nih.gov/pubmed/21471476 %8 04/2011