STAT3 and T-cell large granular lymphocyte leukemia: In addition to LGLL patient cells, we used KAI NK cells and cytokine-stimulated CD8+ T cells to validate the consequences of STAT3 pathway activation although it needs to be taken into account that due to gain of function STAT3 mutations, the STAT3 activation in T-LGLL is chronic compared to transient changes induced by cytokine stimulation.