%0 Journal Article %A Jack Needleman %A Paul G Shekelle %T More ward nursing staff improves inpatient outcomes, but how much is enough? %D 2019 %R 10.1136/bmjqs-2018-009266 %J BMJ Quality & Safety %P 603-605 %V 28 %N 8 %U https://qualitysafety.bmj.com/content/qhc/28/8/603.full.pdf