%0 Journal Article %A Kaveh G Shojania %A Eric J Thomas %T Trends in adverse events over time: why are we not improving? %D 2013 %R 10.1136/bmjqs-2013-001935 %J BMJ Quality & Safety %P 273-277 %V 22 %N 4 %U https://qualitysafety.bmj.com/content/qhc/22/4/273.full.pdf