@misc{indiciaed51492cca477,
  title = {The preoperative electrocardiogram.},
  author = {R A Elston and D J Taylor},
  year = {1984},
  doi = {10.1016/s0140-6736(84)90402-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/6141421/},
  note = {Source identifier: 6141421}
}