Investigation of perinatal birth defects from 2001 to 2013 in Pingyin,Shandong province.
XU Xin1,LI Shi-xue1,ZHAO Si-qi1,YU Zhi-xia2.
(1 School of Public Health,Shandong University,Jinan,Shandong 250012,China;2 Maternal and Child Health Care Hospital of Pingyin,Jinan,Shandong 250400,China) Corresponding author:LI Shi-xue,E-mail:shixueli@sdu.edu.cn