RT Journal Article SR Electronic T1 Rigorous evaluations of evolving interventions: can we have our cake and eat it too? JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP bmjqs-2017-007554 DO 10.1136/bmjqs-2017-007554 A1 Robert E Burke A1 Kaveh G Shojania YR 2018 UL http://qualitysafety.bmj.com/content/early/2018/02/09/bmjqs-2017-007554.abstract AB