@article{hong-liang liu2024of,
  title={Comparison of systemic morphine, nalbuphine, and epidural analgesia on acute and chronic postoperative pain in laparoscopic colorectal surgery: a randomized controlled trial},
  author={yan jiang,xiao-long liang,shu-fang sun,qi chen,hong-liang liu},
  journal={Signa Vitae},
  volume={20},
  number={10},
  pages={38--46},
  doi = {10.22514/sv.2024.124},
  year={2024}
}