硝酸甘油雾化吸入对包头地区老年COPD患者肺动脉压的影响
초산감유무화흡입대포두지구노년COPD환자폐동맥압적영향
The Effect of Nebulization Inhalation of Nitroglycerin on Pulmonary Artery Pressure of Elderly COPD Patients in Baotou
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