- In the Phase I portion, there is no limit on prior systemic therapies (cytotoxic or targeted therapies); however, patients who have discontinued previous vascular endothelial growth factor (VEGF) inhibitors secondary to adverse events are not eligible; in the Phase 2 portion, patients cannot have received more than 1 prior chemotherapy (cytotoxic or targeted) regimen; prior VEGF-pathway inhibitors or B-RAF inhibitors are permissible