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Pfeiffer BD, Truman JW, Rubin GM.Pfeiffer BD, et al. Among authors: truman jw.Proc Natl Acad Sci U S A. 2012 Apr 24;109(17):6626-31. doi: 10.1073/pnas.1204520109. Epub 2012 Apr 9.Proc Natl Acad Sci U S A. 2012.PMID: 22493255Free PMC article.