开封市出生缺陷影响因素病例对照研究

王珊,潘新娟,余增丽

Case-control study on influencing factors of perinatal birth defects in Kaifeng city.

WANG Shan,PAN Xin-juan,YU Zeng-li.

中国儿童保健杂志 . 2013, (2): 161 -163 .