@misc{indiciaecacf0ce38467,
  title = {Letter: "Smudge" ECG.},
  author = {T B Graboys and J A Majzoub},
  year = {1975},
  doi = {10.1056/nejm197501022920121},
  url = {https://pubmed.ncbi.nlm.nih.gov/1109197/},
  note = {Source identifier: 1109197}
}