@article{x.f. ma2017prognostic,
  title={The prognostic impact of zoledronic acid in patients with early breast cancer: systematic assessment},
  author={j.p. long,w. deng,x.f. ma,h.y. mao,x.y. du},
  journal={European Journal of Gynaecological Oncology},
  volume={38},
  number={5},
  pages={685--689},
  doi = {10.12892/ejgo3633.2017},
  year={2017}
}