Tangel VE, Bryant-Huppert J, Jiang SY, Oxford-Horrey CM, Dzotsi S, Kjaer K, et al. Comparative performance of obstetric comorbidity indices within categories of race and ethnicity: an external validation study. International Journal of Obstetric Anesthesia. 2022;50:103543.

Sastow DL, Jiang SY, Tangel VE, Matthews KC, Abramovitz SE, Oxford-Horrey CM, et al. Patient race and racial composition of delivery unit associated with disparities in severe maternal morbidity: a multistate analysis 2007-2014. Int J Obstet Anesth. 2021;47:103160.