RT Journal Article SR Electronic T1 Mixed methods research: expanding the evidence base JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP ebnurs-2017-102699 DO 10.1136/eb-2017-102699 A1 Allison Shorten A1 Joanna Smith YR 2017 UL http://ebn.bmj.com/content/early/2017/06/13/eb-2017-102699.abstract AB