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Hsu Y, Fenner DE, Weadock WJ, DeLancey JO.Hsu Y, et al. Among authors: delancey jo.Obstet Gynecol. 2005 Dec;106(6):1259-65. doi: 10.1097/01.AOG.0000189084.82449.fc.Obstet Gynecol. 2005.PMID: 16319250Free PMC article.