RT Journal Article SR Electronic T1 Conventional evaluations of improvement interventions: more trials or just more tribulations? JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 881 OP 884 DO 10.1136/bmjqs-2013-002377 VO 22 IS 11 A1 Kaveh G Shojania YR 2013 UL http://qualitysafety.bmj.com/content/22/11/881.abstract AB