RT Journal Article SR Electronic T1 Encouraging influenza vaccination for nursing home staff reduced mortality and influenza like illness in the residents JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 81 OP 81 DO 10.1136/ebm.12.3.81 VO 12 IS 3 YR 2007 UL http://ebm.bmj.com/content/12/3/81.abstract AB