(A) Overall actuarial probability of survival (—) of 54 MPSIH patients treated with related-donor BMT. (B) Overall actuarial probability of survival of MPSIH patients treated with GIS (—) or HIR (--) donor BMT. (C) Overall actuarial probability of survival (—) of MPSIH patients with donor cell engraftment following related-donor BMT. (D) Overall actuarial probability of survival of MPSIH patients with donor cell engraftment following GIS (—) or HIR (--) donor BMT.