RT Journal Article SR Electronic T1 Identifying adverse events after outpatient surgery: improving measurement of patient safety JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 3 OP 5 DO 10.1136/bmjqs-2015-004752 VO 25 IS 1 A1 Amy K Rosen A1 Hillary J Mull YR 2016 UL http://qualitysafety.bmj.com/content/25/1/3.abstract AB