HNPPV联合舒利迭治疗稳定期重度COPD合并呼吸衰竭患者的疗效及安全性
HNPPV연합서리질치료은정기중도COPD합병호흡쇠갈환자적료효급안전성
Efficacy and Security of HNPPV Joint Seretide Stable Severe COPD Pa-tients with Respiratory Failure