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Zhao Z, Yang P, Eckert RL, Reece EA.Zhao Z, et al. Among authors: yang p.Birth Defects Res B Dev Reprod Toxicol. 2009 Feb;86(1):72-7. doi: 10.1002/bdrb.20185.Birth Defects Res B Dev Reprod Toxicol. 2009.PMID: 19194987Free PMC article.
Yang P, Cao Y, Li H.Yang P, et al.Am J Obstet Gynecol. 2010 Aug;203(2):185.e5-11. doi: 10.1016/j.ajog.2010.05.003. Epub 2010 Jun 11.Am J Obstet Gynecol. 2010.PMID: 20541731Free PMC article.