@misc{indiciaeb3c77ef9240f,
  title = {Required beta blocker profile in the elderly.},
  author = {L H Opie},
  year = {1991},
  doi = {10.1007/bf00114233},
  url = {https://pubmed.ncbi.nlm.nih.gov/1672603/},
  note = {Source identifier: 1672603}
}