AU  - Wong K, Campitelli MA, Stukel TA, Kwong JC
TI  - EStimating influenza vaccine effectiveness in community-dwelling elderly patients using the instrumental variable analysis method
PT  - JOUR
DP  - 2012
TA  - Archives of Internal Medicine
pages = {484-491},
VI  - 172
IP  - 6
AID  - 10.1001/archinternmed.2011.2038 [doi]
4100  - http://dx.doi.org/10.1001/archinternmed.2011.2038
SO  - Archives of Internal Medicine March 26, 2012 172(6):484