Conclusions the reduction in death from all causes among patients with COPD in the combination-therapy group did not reach the predetermined level of statistical significance.
结论：联合治疗对COPD患者死亡率的降低并未达到预期的水平和统计学意义。
Conclusions the reduction in death from all causes among patients with COPD in the combination-therapy group did not reach the predetermined level of statistical significance.
结论：联合治疗对COPD患者死亡率的降低并未达到预期的水平和统计学意义。
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