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Validity and timeliness of syndromic influenza surveillance during the autumn/winter wave of A (H1N1) influenza 2009: results of emergency medical dispatch, ambulance and emergency department data from three European regions

Nicole Rosenkötter*, Alexandra Ziemann, Luis Garcia-Castrillo Riesgo, Jean Bernard Gillet, Gernot Vergeiner, Thomas Krafft and Helmut Brand

BMC Public Health 2013, 13:905  doi:10.1186/1471-2458-13-905