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    					| Application of Doxofylline Combined with Budesonide in Patients with Acute Exacerbation of Chronic Obstructive Pulmonary Disease | 
  					 
  					  										
						| WU Manli | 
					 
															
						| First-author's address: Department of Respiratory and Critical Care Medicine, the First People's Hospital of Zunyi, Zunyi 563000, China | 
					 
										
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