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Swanson PA 2nd, Kumar A, Samarin S, Vijay-Kumar M, Kundu K, Murthy N, Hansen J, Nusrat A, Neish AS.Swanson PA 2nd, et al.Proc Natl Acad Sci U S A. 2011 May 24;108(21):8803-8. doi: 10.1073/pnas.1010042108. Epub 2011 May 9.Proc Natl Acad Sci U S A. 2011.PMID: 21555563Free PMC article.