@article{y.f. zhou2008factors,
  title={Risk factors for cervical cancer in China: a case-control study},
  author={h.b. cai,x.h. ding,y.f. zhou,d.m. lie},
  journal={European Journal of Gynaecological Oncology},
  volume={29},
  number={1},
  pages={72--75},
  doi = {10.12892/ejgo20080172},
  year={2008}
}