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Keller AM, Groothuis TA, Veraar EA, Marsman M, Maillette de Buy Wenniger L, Janssen H, Neefjes J, Borst J.Keller AM, et al. Among authors: veraar ea.Proc Natl Acad Sci U S A. 2007 Apr 3;104(14):5989-94. doi: 10.1073/pnas.0700946104. Epub 2007 Mar 26.Proc Natl Acad Sci U S A. 2007.PMID: 17389361Free PMC article.