LAG3 and melanoma: Melanoma cells (control or treated with IFNγ) were used for cytotoxicity assays with primary NK‐cells, treated with an Fc block and incubated with either isotype control (ctrl ab) or a LAG3 blocking antibody (αLAG3), which was previously described to disturb the interaction between MHC II and LAG3 [54, 56].