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Gupta RK, Mlcochova P, Pelchen-Matthews A, Petit SJ, Mattiuzzo G, Pillay D, Takeuchi Y, Marsh M, Towers GJ.Gupta RK, et al.Proc Natl Acad Sci U S A. 2009 Dec 8;106(49):20889-94. doi: 10.1073/pnas.0907075106. Epub 2009 Oct 28.Proc Natl Acad Sci U S A. 2009.PMID: 19864625Free PMC article.