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Brown DR, Brown CR, Lehr EE.Brown DR, et al. Among authors: lehr ee.Intervirology. 2004;47(6):321-7. doi: 10.1159/000080875.Intervirology. 2004.PMID: 15564743
Spartz H, Lehr E, Zhang B, Roman A, Brown DR.Spartz H, et al.Virology. 2005 May 25;336(1):11-25. doi: 10.1016/j.virol.2005.02.026.Virology. 2005.PMID: 15866067Free article.