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Strange BA, Fletcher PC, Henson RN, Friston KJ, Dolan RJ.Strange BA, et al. Among authors: henson rn.Proc Natl Acad Sci U S A. 1999 Mar 30;96(7):4034-9. doi: 10.1073/pnas.96.7.4034.Proc Natl Acad Sci U S A. 1999.PMID: 10097158Free PMC article.