左氧氟沙星与莫西沙星治疗老年AECOPD的疗效研究
좌양불사성여막서사성치료노년AECOPD적료효연구
Comparative study of the efficacy and safety between levofloxacin and moxifloxacin in the treatment of senile patients with acute chronic obstructive pulmonary disease
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