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Ben-Ze'ev A, Robinson GS, Bucher NL, Farmer SR.Ben-Ze'ev A, et al. Among authors: bucher nl.Proc Natl Acad Sci U S A. 1988 Apr;85(7):2161-5. doi: 10.1073/pnas.85.7.2161.Proc Natl Acad Sci U S A. 1988.PMID: 3353374Free PMC article.