RT Journal Article SR Electronic T1 Nurses matter: more evidence JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP bmjqs-2019-009732 DO 10.1136/bmjqs-2019-009732 A1 Linda H Aiken A1 Douglas M Sloane YR 2019 UL http://qualitysafety.bmj.com/content/early/2019/09/08/bmjqs-2019-009732.abstract AB