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Taylor RN, Casal DC, Jones LA, Varma M, Martin JN Jr, Roberts JM.Taylor RN, et al. Among authors: casal dc.Am J Obstet Gynecol. 1991 Dec;165(6 Pt 1):1705-10. doi: 10.1016/0002-9378(91)90019-n.Am J Obstet Gynecol. 1991.PMID: 1750464
Young SG, Bertics SJ, Curtiss LK, Casal DC, Witztum JL.Young SG, et al. Among authors: casal dc.Proc Natl Acad Sci U S A. 1986 Feb;83(4):1101-5. doi: 10.1073/pnas.83.4.1101.Proc Natl Acad Sci U S A. 1986.PMID: 2419898Free PMC article.