OX40- and CD27-mediated costimulation synergizes with anti-PD-L1 blockade by forcing exhausted CD8+ T cells to exit quiescence. - Buchan S; Manzo T; Flutter B; Rogel A; Edwards N; Zhang L; Sivakumaran S; Ghorashian S; Carpenter B; Bennett C; Freeman GJ; Sykes M; et al. (Journal of immunology (Baltimore, Md. : 1950), 2015)