RT Journal Article SR Electronic T1 More ward nursing staff improves inpatient outcomes, but how much is enough? JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 603 OP 605 DO 10.1136/bmjqs-2018-009266 VO 28 IS 8 A1 Jack Needleman A1 Paul G Shekelle YR 2019 UL http://qualitysafety.bmj.com/content/28/8/603.abstract AB