RT Journal Article SR Electronic T1 Value of small sample sizes in rapid-cycle quality improvement projects JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 202 OP 206 DO 10.1136/bmjqs-2015-005094 VO 25 IS 3 A1 Etchells, E A1 Ho, M A1 Shojania, K G YR 2016 UL http://qualitysafety.bmj.com/content/25/3/202.abstract AB