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McManus KJ, Barrett IJ, Nouhi Y, Hieter P.McManus KJ, et al.Proc Natl Acad Sci U S A. 2009 Mar 3;106(9):3276-81. doi: 10.1073/pnas.0813414106. Epub 2009 Feb 13.Proc Natl Acad Sci U S A. 2009.PMID: 19218431Free PMC article.