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Varman AM, He L, Follenfant R, Wu W, Wemmer S, Wrobel SA, Tang YJ, Singh S.Varman AM, et al. Among authors: wrobel sa.Proc Natl Acad Sci U S A. 2016 Oct 4;113(40):E5802-E5811. doi: 10.1073/pnas.1606043113. Epub 2016 Sep 15.Proc Natl Acad Sci U S A. 2016.PMID: 27634497Free PMC article.