RT Journal Article SR Electronic T1 Correction JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 717 OP 717 DO 10.1136/bmjqs-2014-003845corr1 VO 24 IS 11 YR 2015 UL http://qualitysafety.bmj.com/content/24/11/717.abstract AB