Results of IFN ELISPOT-based panel of reactive T-cell assays ( PRT ) , quantifying alloreactive memory , demonstrated greater increases in the controls over 1 year compared to the treatment group ( delta PRT in treatment 104.8 + / -330.8 vs 252.9 + / -431.3 in control ) , but these changes in PRT between groups did not reach statistical significance ( p = 0.25 ) .