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Schild D, Brake AJ, Kiefer MC, Young D, Barr PJ.Schild D, et al. Among authors: kiefer mc.Proc Natl Acad Sci U S A. 1990 Apr;87(8):2916-20. doi: 10.1073/pnas.87.8.2916.Proc Natl Acad Sci U S A. 1990.PMID: 2183217Free PMC article.
Kiefer MC, Stephans JC, Crawford K, Okino K, Barr PJ.Kiefer MC, et al.Proc Natl Acad Sci U S A. 1990 Sep;87(18):6985-9. doi: 10.1073/pnas.87.18.6985.Proc Natl Acad Sci U S A. 1990.PMID: 2144898Free PMC article.
Wise RJ, Barr PJ, Wong PA, Kiefer MC, Brake AJ, Kaufman RJ.Wise RJ, et al. Among authors: kiefer mc.Proc Natl Acad Sci U S A. 1990 Dec;87(23):9378-82. doi: 10.1073/pnas.87.23.9378.Proc Natl Acad Sci U S A. 1990.PMID: 2251280Free PMC article.