Donor-Specific T cell Proliferation (mixed lymphocyte reaction). Co-culture of recipient’s blood lymphocytes and irradiated donor lymphocytes was stimulated by the T cell mitogen, ConA. Same experimental procedure was performed as MLR for lymphocyte proliferation analysis. Proliferative response was represented by DPM. Plus signs indicate the statistically significant induction of proliferative response (p < 0.05) compared to D-35 baseline activity. Asterisks indicate the statistical significance of decreased proliferative response compared to D-35 baseline activity (p < 0.05).