A, Time to CMV viral reactivation in blood in combined treatment groups (valacyclovir and valganciclovir arms) vs control group (hazard ratio, 0.14; 95% CI, 0.04-0.50). B, Time to CMV viral reactivation in blood in valganciclovir group vs control group (hazard ratio, 0.08; 95% CI, 0.01-0.58).