@article{doi-10-3389-fonc-2021-659217,
  title = {Efficacy and Safety of Apatinib Treatment for Advanced Cholangiocarcinoma After Failed Gemcitabine-Based Chemotherapy: An Open-Label Phase II Prospective Study},
  author = {Ge Zhang and Shuai Gong and Lina Pang and Lixia Hou and Wei He},
  journal = {Frontiers in Oncology},
  year = {2021},
  volume = {11},
  eid = {659217},
  doi = {10.3389/fonc.2021.659217},
  url = {https://doi.org/10.3389/fonc.2021.659217}
}