Cumulative incidence for first SRE by bisphosphonate (ZOL vs CLO). (A) Patients who achieved a VGPR or less posttransplant (P = .048); PR (hazard ratio 0.74 [HR]; 95% confidence interval [CI], 0.52-1.05); VGPR (HR, 0.87; 95% CI, 0.60-1.27). (B) Patients who achieved a CR posttransplant (HR, 1.05, 95% CI, 0.82-1.35; P = .83).