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Ørsted I, Mølvadgaard M, Nielsen HL, Nielsen H.Ørsted I, et al. Among authors: nielsen h, nielsen hl.Influenza Other Respir Viruses. 2013 Sep;7(5):776-82. doi: 10.1111/irv.12093. Epub 2013 Feb 9.Influenza Other Respir Viruses. 2013.PMID: 23398935Free PMC article.