TNFSF13B and medical procedure: In this study, we sought to analyze the clinical significance of measuring pre-transplant and post-transplant serum BAFF levels in kidney transplant recipients We found that although pre-transplant BAFF was associated with pre-sensitization and allograft rejection as in previous studies [12,13], post-transplant BAFF correlated only with pre-sensitization and not with appearance of de novo HLA-DSA, allograft rejection, biopsy findings and other allograft outcomes.