无创辅助通气治疗慢性阻塞性肺疾病合并急性左心衰的疗效
무창보조통기치료만성조새성폐질병합병급성좌심쇠적료효
Curative effect of noninvasive assistant ventilation in the treatment of elderly patients with chronic obstructive pulmonary disease complicated with acute left heart failure
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