RT Journal Article SR Electronic T1 Purpose and procedure JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 66 OP 67 DO 10.1136/ebn.5.3.66 VO 5 IS 3 YR 2002 UL http://ebn.bmj.com/content/5/3/66.abstract AB