Percentages and origins of CMV-specific, tetramer-positive T cells in recipients of HSC grafts from CMV-positive donors 3 months after transplantation. (A) Patient 1. (B) Patient 3. (C) Patient 6. (D) Patient 10. Percentages of tetramer-positive cells in donor (D) and patient before (Pb) and after (Pa) transplantation and the corresponding STR analysis for the loci Penta E (A,D), SE33 (B), and D11S554 (C).