RT Journal Article SR Electronic T1 Evaluating the effect of a national collaborative: a cautionary tale JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 621 OP 623 DO 10.1136/bmjqs-2012-001065 VO 21 IS 8 A1 Anne Sales A1 Sanjay Saint YR 2012 UL http://qualitysafety.bmj.com/content/21/8/621.abstract AB