RT Journal Article SR Electronic T1 What are cohort studies? JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 95 OP 96 DO 10.1136/ebnurs-2019-103183 VO 22 IS 4 A1 David Barrett A1 Helen Noble YR 2019 UL http://ebn.bmj.com/content/22/4/95.abstract AB