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Whelan SP, Ball LA, Barr JN, Wertz GT.Whelan SP, et al. Among authors: barr jn.Proc Natl Acad Sci U S A. 1995 Aug 29;92(18):8388-92. doi: 10.1073/pnas.92.18.8388.Proc Natl Acad Sci U S A. 1995.PMID: 7667300Free PMC article.
Kohl A, Bridgen A, Dunn E, Barr JN, Elliott RM.Kohl A, et al. Among authors: barr jn.J Gen Virol. 2003 Apr;84(Pt 4):789-793. doi: 10.1099/vir.0.18963-0.J Gen Virol. 2003.PMID: 12655079