@article{w.d. fan2017prognostic,
  title={The prognostic role of circulating tumor cells and
disseminated tumor cells in patients with ovarian cancer:
a systematic review and meta-analysis},
  author={c. zeng,x.q. zhang,w.d. fan,t. ting},
  journal={European Journal of Gynaecological Oncology},
  volume={38},
  number={4},
  pages={504--510},
  doi = {10.12892/ejgo3396.2017},
  year={2017}
}