PT - JOURNAL ARTICLE ED - , TI - Review: enhanced oral hygiene prevents respiratory infection in elderly people in hospitals and nursing homes AID - 10.1136/ebm.14.3.80 DP - 2009 Jun 01 TA - Evidence Based Medicine PG - 80--80 VI - 14 IP - 3 4099 - http://ebm.bmj.com/content/14/3/80.short 4100 - http://ebm.bmj.com/content/14/3/80.full SO - Evid Based Med2009 Jun 01; 14