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Fenley AT, Muddana HS, Gilson MK.Fenley AT, et al. Among authors: gilson mk.Proc Natl Acad Sci U S A. 2012 Dec 4;109(49):20006-11. doi: 10.1073/pnas.1213180109. Epub 2012 Nov 13.Proc Natl Acad Sci U S A. 2012.PMID: 23150595Free PMC article.