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    					| Effect of High Flow Nasal Cannula and Non-invasive Ventilation on Blood Gas Analysis Indexes and Comfort Level in Patients with AECOPD and Type Ⅱ Respiratory Failure | 
  					 
  					  										
						| YANG Ziqi | 
					 
															
						| First-author's address: General Practice Department, Ganzhou People's Hospital, Ganzhou 341000, China | 
					 
										
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