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Michener JK, Nielsen J, Smolke CD.Michener JK, et al. Among authors: smolke cd.Proc Natl Acad Sci U S A. 2012 Nov 20;109(47):19504-9. doi: 10.1073/pnas.1212287109. Epub 2012 Nov 5.Proc Natl Acad Sci U S A. 2012.PMID: 23129650Free PMC article.