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Calton CM, Schlegel AM, Chapman JA, Campos SK.Calton CM, et al. Among authors: campos sk.J Gen Virol. 2013 Aug;94(Pt 8):1865-1869. doi: 10.1099/vir.0.053694-0. Epub 2013 May 15.J Gen Virol. 2013.PMID: 23677785
Campos SK, Barry MA.Campos SK, et al.Virology. 2006 Jun 5;349(2):453-62. doi: 10.1016/j.virol.2006.01.032. Epub 2006 Feb 28.Virology. 2006.PMID: 16504233Free article.