PDCD1 and pachyonychia congenita: The addition of anti-CD137 antibodies (20 μg BIW for 4 weeks; clone BMS-469452) to GVAX (on day 4, 7, 14, and 21) and anti-PD-1 antibodies (100 μg BIW for 4 weeks; clone 4H2) further improved survival in a syngeneic liver-metastatic PC mouse model.