An Fc-inert PD-L1×4-1BB bispecific antibody mediates potent anti-tumor immunity in mice by combining checkpoint inhibition and conditional 4-1BB co-stimulation. - Muik A; Altintas I; Gieseke F; Schoedel KB; Burm SM; Toker A; Salcedo TW; Verzijl D; Eisel D; Grunwitz C; Kranz LM; Vormehr M; et al. (Oncoimmunology, 2022)