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Joseph KS, Huang L, Liu S, Ananth CV, Allen AC, Sauve R, Kramer MS; Fetal and Infant Health Study Group of the Canadian Perinatal Surveillance System.Joseph KS, et al. Among authors: ananth cv.Obstet Gynecol. 2007 Apr;109(4):813-22. doi: 10.1097/01.AOG.0000255661.13792.c1.Obstet Gynecol. 2007.PMID: 17400841