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Sherman DR, Voskuil M, Schnappinger D, Liao R, Harrell MI, Schoolnik GK.Sherman DR, et al.Proc Natl Acad Sci U S A. 2001 Jun 19;98(13):7534-9. doi: 10.1073/pnas.121172498.Proc Natl Acad Sci U S A. 2001.PMID: 11416222Free PMC article.