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Schelhaas M, Jansen M, Haase I, Knebel-Mörsdorf D.Schelhaas M, et al.J Gen Virol. 2003 Sep;84(Pt 9):2473-2484. doi: 10.1099/vir.0.19226-0.J Gen Virol. 2003.PMID: 12917468