Overall survival of MRD and MUD/MM CyTBI patients. (A) Overall survival of MRD (A) and MUD/MM (B) Cy/TBI patients. Overall survival was significantly better in the Tac/Sir group in comparison with the Tac/Sir/Mtx and Tac/Mtx in both the MRD (P = .05) and MUD/MM groups (P = .005).