@misc{indiciae556634e2a443,
  title = {Letter: Ventilatory depression after morphine.},
  author = {R E Johnstone},
  year = {1975},
  doi = {10.1056/nejm197507242930422},
  url = {https://pubmed.ncbi.nlm.nih.gov/1134542/},
  note = {Source identifier: 1134542}
}