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Comparison of five influenza surveillance systems during the 2009 pandemic and their association with media attention

Marit MA de Lange*, Adam Meijer, Ingrid HM Friesema, Gé A Donker, Carl E Koppeschaar, Mariëtte Hooiveld, Nel Ruigrok and Wim van der Hoek

BMC Public Health 2013, 13:881  doi:10.1186/1471-2458-13-881

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