@article{qin shen2021effect,
  title={The effect of clinical hierarchical nursing intervention on patients with acute non-variceal upper gastrointestinal bleeding},
  author={qin shen,yang zheng,ting he,ting mao},
  journal={Signa Vitae},
  volume={17},
  number={3},
  pages={144--150},
  doi = {10.22514/sv.2021.076},
  year={2021}
}