Recent changes in maternal characteristics by socioeconomic status.
Joseph KS, Fahey J, Dendukuri N, Allen VM, O'Campo P, Dodds L, Liston RM, Allen AC.
Joseph KS, et al. Among authors: allen ac, allen vm.
J Obstet Gynaecol Can. 2009 May;31(5):422-33. doi: 10.1016/s1701-2163(16)34173-1.
J Obstet Gynaecol Can. 2009.
PMID: 19604423