Graft survival at 12 months. (A) Difference between transfused and non-transfused patients. (B) Number of pre-transfusions. *Significant difference as reported in the original publication; values have been rounded to the nearest integer, unless < 1. NOTE: Additional calculation has been performed to allow for comparison between the populations of interest. Therefore, the numbers presented differ from those presented in the primary source publications with the exception of Poli 1995 and Opelz 1997. NR: not reported; n = sample size with reported outcome; CsA: cyclosporin A; DST: donor-specific transfusion.