@misc{indiciae11f926d6bf5a,
  title = {Letter: Beta-blocker?},
  author = {F O Simpson},
  year = {1973},
  doi = {10.1016/s0140-6736(73)93374-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4128099/},
  note = {Source identifier: 4128099}
}