长期联合吸入异丙托溴胺与沙丁胺醇的老年慢性阻塞性肺疾病患者对支气管扩张剂的反应性观察
장기연합흡입이병탁추알여사정알순적노년만성조새성폐질병환자대지기관확장제적반응성관찰
A survey about old patients of chronic obstructive pulmonary disease to respond to bronchodilator after long-term inhalation of ipratropium bromide and salbutamol
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