拉氧头孢钠治疗Ⅲ~Ⅳ级AECOPD并感染疗效观察
랍양두포납치료Ⅲ~Ⅳ급AECOPD병감염료효관찰
Curative effect observation on latamoxef sodium for the treatment of Ⅲ to Ⅳ grade AECOPD and infection
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