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Cadavid LF, Shufflebotham C, Ruiz FJ, Yeager M, Hughes AL, Watkins DI.Cadavid LF, et al.Proc Natl Acad Sci U S A. 1997 Dec 23;94(26):14536-41. doi: 10.1073/pnas.94.26.14536.Proc Natl Acad Sci U S A. 1997.PMID: 9405648Free PMC article.