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Vazey EM, Aston-Jones G.Vazey EM, et al.Proc Natl Acad Sci U S A. 2014 Mar 11;111(10):3859-64. doi: 10.1073/pnas.1310025111. Epub 2014 Feb 24.Proc Natl Acad Sci U S A. 2014.PMID: 24567395Free PMC article.