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    					| The Value of Serological Test Combined with Cytological Test in Prenatal Diagnosis of Elderly Parturients | 
  					 
  					  										
						| YIN Miaoxia, HU Xiaodi, ZHANG Zaohua, LIN Xiangrong | 
					 
															
						| First-author's address: Department of Obstetrics, Longgang Central Hospital of Shenzhen, Shenzhen 518116, China | 
					 
										
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