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Zetterström P, Stewart HG, Bergemalm D, Jonsson PA, Graffmo KS, Andersen PM, Brännström T, Oliveberg M, Marklund SL.Zetterström P, et al. Among authors: graffmo ks.Proc Natl Acad Sci U S A. 2007 Aug 28;104(35):14157-62. doi: 10.1073/pnas.0700477104. Epub 2007 Aug 21.Proc Natl Acad Sci U S A. 2007.PMID: 17715066Free PMC article.