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Baric RS, Sims AC.Baric RS, et al. Among authors: sims ac.Proc Natl Acad Sci U S A. 2005 Jun 7;102(23):8073-4. doi: 10.1073/pnas.0503091102. Epub 2005 May 31.Proc Natl Acad Sci U S A. 2005.PMID: 15928078Free PMC article.No abstract available.