PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd and RCN Publishing Company Ltd TI - Purpose and procedure AID - 10.1136/ebn.5.3.66 DP - 2002 Jul 01 TA - Evidence Based Nursing PG - 66--67 VI - 5 IP - 3 4099 - http://ebn.bmj.com/content/5/3/66.short 4100 - http://ebn.bmj.com/content/5/3/66.full SO - Evid Based Nurs2002 Jul 01; 5