RT Journal Article SR Electronic T1 Evaluation of qualitative research studies JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 36 OP 40 DO 10.1136/ebn.6.2.36 VO 6 IS 2 A1 Cynthia K Russell A1 David M Gregory YR 2003 UL http://ebn.bmj.com/content/6/2/36.abstract AB