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Lindås AC, Karlsson EA, Lindgren MT, Ettema TJ, Bernander R.Lindås AC, et al. Among authors: bernander r.Proc Natl Acad Sci U S A. 2008 Dec 2;105(48):18942-6. doi: 10.1073/pnas.0809467105. Epub 2008 Nov 5.Proc Natl Acad Sci U S A. 2008.PMID: 18987308Free PMC article.