MAIT cells (CD3+CD161+Vα7.2TCR+) were the only CD8+ IL-17A-secreting T cell subset following G-CSF mobilization, and the proportions of RORγt-expressing or coexpressing IFN-γ/IL-17A associated with chronic GVHD in MAIT cells were further enhanced with G-CSF mobilization (69). This evidence concerns the gene CSF3 and chronic graft versus host disease.