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    					| Clinical Observation of Salmeterol Xinafoate and Fluticasone Propionate Assisted Nasal High Flow Oxygen Therapy in the Treatment of Acute Exacerbation of COPD Complicated with Type Ⅱ Respiratory Failure | 
  					 
  					  										
						| MA Awei, WANG Yanxia, SHANG Quanzhen | 
					 
															
						| First-author's address: Hospital of the Third Division of Xinjiang Production and Construction Corps, Kashi 844000, China | 
					 
										
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