FOXP3 and graft versus host disease: Novel subsets of regulatory γδ T cell that express Foxp3 were associated with lower GvHD in HSCT patients.72 Interestingly, the Foxp3‐positive subsets utilised both Vδ1 and Vδ2 TCR segments, and a follow‐up study narrowed the effective subset to be CD27+Vδ1+.