[Skip to Navigation Landing] Visual Abstract. Effect of Taxane Chemotherapy With or Without Indoximod in Metastatic Breast Cancer Figure 2. Outcomes in the Entire Study Population and Within the IDO1-Analyzed Population A, Progression-free survival in the modified intention-to-treat (mITT) population; B, Overall survival in the mITT population; C, Progression-free survival in the indoleamine 2,3-dioxygenase 1 (IDO1)-low population; D, Progression-free survival in the IDO-high population.