Creanga, A. A., Bateman, B. T., Kuklina, E. V., & Callaghan, W. M. (2014). Racial and ethnic disparities in severe maternal morbidity: A multistate analysis, 2008-2010. American Journal of Obstetrics and Gynecology, 210(5). doi:10.1016/j.ajog.2013.11.039