HAVCR2 and hematopoietic and lymphoid system neoplasm: A significant proportion of resting BM MM Vγ9Vδ2 T cells showed PD-1 and TIM-3 co-expression, as previously reported in Vγ9Vδ2 T cells chronically exposed to infectious agents (28) or to cancer cells in solid (29, 30) and blood tumors (31).