PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd and RCN Publishing Company Ltd TI - Purpose and procedure AID - 10.1136/ebn.3.2.34 DP - 2000 Apr 01 TA - Evidence Based Nursing PG - 34--35 VI - 3 IP - 2 4099 - http://ebn.bmj.com/content/3/2/34.short 4100 - http://ebn.bmj.com/content/3/2/34.full SO - Evid Based Nurs2000 Apr 01; 3