@misc{indiciae551a0687c3d2,
  title = {Endogenous nitric oxide modulates morphine-induced constipation.},
  author = {A Calignano and S Moncada and M Di Rosa},
  year = {1991},
  doi = {10.1016/0006-291x(91)91274-g},
  url = {https://pubmed.ncbi.nlm.nih.gov/1755865/},
  note = {Source identifier: 1755865}
}