@article{:/content/10.2807/1560-7917.ES2015.20.16.21100, author = "Savage, R D and Winter, A L and Rosella, L C and Olsha, R and Gubbay, J B and Skowronski, D M and Crowcroft, N S", title = "Strengths and limitations of assessing influenza vaccine effectiveness using routinely collected, passive surveillance data in Ontario, Canada, 2007 to 2012: balancing efficiency versus quality", journal = "Eurosurveillance", year = "2015", volume = "20", number = "16", eid = 21100, pages = "", url = "https://www.eurosurveillance.org/content/10.2807/1560-7917.ES2015.20.16.21100", doi = "https://doi.org/10.2807/1560-7917.ES2015.20.16.21100" }