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Haffar OK, Smithgall MD, Bradshaw J, Brady B, Damle NK, Linsley PS.Haffar OK, et al. Among authors: bradshaw j.Proc Natl Acad Sci U S A. 1993 Dec 1;90(23):11094-8. doi: 10.1073/pnas.90.23.11094.Proc Natl Acad Sci U S A. 1993.PMID: 7504294Free PMC article.