Casecontrol study; Cervical cancer; Risk factor.

妇女；宫颈癌；危险因素。

youdao

Birth Defects; Orofacial clefts; Casecontrol Study; Environmental risk factors.

唇腭裂；出生缺陷；病例对照研究；环境危险因素。

youdao

Birth Defects; Orofacial clefts; Casecontrol Study; Environmental risk factors.

唇腭裂；出生缺陷；病例对照研究；环境危险因素。

youdao