Donor and recipient chimerism within the RIC group. (A) Cumulative incidence of mixed chimerism within the RIC group. Full donor chimerism = 95% or greater donor cells detected in whole blood samples. Mixed donor/recipient chimerism ≤ 95% donor cells detected in whole blood samples on more than one occasion. (B) Individual patient donor chimerism kinetics within RIC group patients. (C) Distribution of donor chimerism over time within the RIC group.