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Villalobos C, Núñez L, Frawley LS, García-Sancho J, Sánchez A.Villalobos C, et al.Proc Natl Acad Sci U S A. 1997 Dec 9;94(25):14132-7. doi: 10.1073/pnas.94.25.14132.Proc Natl Acad Sci U S A. 1997.PMID: 9391165Free PMC article.