TRDV1 and graft versus host disease: These results suggested that compared with other TRDV and TRGV repertoire, some donors' TRDV1 repertoire might be more sensitive to GVHD-associated antigens after G-CSF mobilization, causing the occurrence of GVHD; whereas TRDV1 repertoire of most donors maintained stability after G-CSF mobilization, resulting in low incidence of GVHD.