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Cumulative survival probability in rabbits with experimental Pseudomonas aeruginosa pneumonia treated with ceftolozane-tazobactam (C/T), ceftazidime (CAZ), and piperacillin-tazobactam (TZP) according to mechanism of resistance. *, P < 0.05; †, P < 0.01; ¶, P < 0.01 (prolonged survival in treatment groups). All values are expressed as percentage of cumulative survival probability.
