PT - JOURNAL ARTICLE AU - Mary A Blegen TI - Does certification of staff nurses improve patient outcomes? AID - 10.1136/ebnurs.2011.100228 DP - 2012 Apr 01 TA - Evidence Based Nursing PG - 54--55 VI - 15 IP - 2 4099 - http://ebn.bmj.com/content/15/2/54.short 4100 - http://ebn.bmj.com/content/15/2/54.full SO - Evid Based Nurs2012 Apr 01; 15