RT Journal Article SR Electronic T1 Ranking hospitals on avoidable death rates derived from retrospective case record review: methodological observations and limitations JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 554 OP 557 DO 10.1136/bmjqs-2015-004366 VO 24 IS 9 A1 Gary Abel A1 Georgios Lyratzopoulos YR 2015 UL http://qualitysafety.bmj.com/content/24/9/554.abstract AB