TNFRSF1A and post-transplant lymphoproliferative disease: Analysis of the TNFRI promoter at position −201 showed a significant increase in the frequency of the −201GG genotype and a decrease of the −201TT genotype in the PTLD group compared with the transplant and healthy control groups (GG: 47% vs 31%, TT: 4% vs 20%, P=0.03 for PTLD vs transplant controls; GG: 47% vs 26%, TT: 4% vs 20%, P=0.006 for PTLD vs healthy controls; Table 2).