PT - JOURNAL ARTICLE ED - , TI - Purpose and procedure AID - 10.1136/ebn.4.3.66 DP - 2001 Jul 01 TA - Evidence Based Nursing PG - 66--67 VI - 4 IP - 3 4099 - http://ebn.bmj.com/content/4/3/66.short 4100 - http://ebn.bmj.com/content/4/3/66.full SO - Evid Based Nurs2001 Jul 01; 4