RT Journal Article SR Electronic T1 Cutting edge or blunt instrument: how to decide if a stepped wedge design is right for you JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP bmjqs-2020-011620 DO 10.1136/bmjqs-2020-011620 A1 Richard Hooper A1 Sandra M Eldridge YR 2020 UL http://qualitysafety.bmj.com/content/early/2020/06/16/bmjqs-2020-011620.abstract AB