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Usami Y, Popov S, Weiss ER, Vriesema-Magnuson C, Calistri A, Göttlinger HG.Usami Y, et al.J Virol. 2012 Apr;86(7):3746-56. doi: 10.1128/JVI.06539-11. Epub 2012 Jan 18.J Virol. 2012.PMID: 22258254Free PMC article.