γδ T cells expanded in the patient’s blood after transplantation. Flow cytometric comparison of donor lymphocytes (left panel) with donor γδ T cells recovered from the patient (right panel) 9 months after transplantation. Samples were stained with PE-conjugated anti- pan TCR γδ (clone 11 F2) and FITC-conjugated anti-Vδ9 (Beckman Coulter cat. # PNIM1463). Numbers next to quadrants indicate percentage of gated Vδ9+ (upper gate) and V9δ– (lower gate) γδ T cells among all lymphocytes.