@article{sun2019hydrogel,
  title={Hydrogel-based controlled drug delivery for cancer treatment: a review},
  author={Sun, Zhaoyi and Song, Chengjun and Wang, Chao and Hu, Yiqiao and Wu, Jinhui},
  journal={Molecular pharmaceutics},
  volume={17},
  number={2},
  pages={373--391},
  year={2019},
  publisher={ACS Publications}
}