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de Graaf RA, Mason GF, Patel AB, Rothman DL, Behar KL.de Graaf RA, et al. Among authors: rothman dl.Proc Natl Acad Sci U S A. 2004 Aug 24;101(34):12700-5. doi: 10.1073/pnas.0405065101. Epub 2004 Aug 13.Proc Natl Acad Sci U S A. 2004.PMID: 15310848Free PMC article.