Kaplan-Meier survival curves for the patients with deletions of either ABL (n = 20) or BCR sequences (n = 18), only, compared with all patients without deletions. (A) Overall survival, (B) survival censored at time of switch to imatinib or allogeneic stem cell transplantation in the first chronic phase, (C) survival after allogeneic stem cell transplantation in the first chronic phase.