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Illing N, Troskie BE, Nahorniak CS, Hapgood JP, Peter RE, Millar RP.Illing N, et al. Among authors: hapgood jp.Proc Natl Acad Sci U S A. 1999 Mar 2;96(5):2526-31. doi: 10.1073/pnas.96.5.2526.Proc Natl Acad Sci U S A. 1999.PMID: 10051676Free PMC article.