a trend toward significancep = .09
Compared to isotype controls, a large increase in survival was observed for mice with established tumors receiving anti-PD-1 monotherapy ( p < .005) or anti-PD-1 plus anti-CTLA-4 together ( p < .0005) when administered after chemotherapy, and a trend toward significance was observed between these two groups ( p = .09) ( Figure 3E,F , Figure S6).