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Anderegg WR, Berry JA, Smith DD, Sperry JS, Anderegg LD, Field CB.Anderegg WR, et al. Among authors: berry ja.Proc Natl Acad Sci U S A. 2012 Jan 3;109(1):233-7. doi: 10.1073/pnas.1107891109. Epub 2011 Dec 13.Proc Natl Acad Sci U S A. 2012.PMID: 22167807Free PMC article.