@misc{indiciae5b9407e388ea,
  title = {[Electrocardiographic changes in severe anemia].},
  author = {G Stefanov and Dan-Duk-Zhan},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/4680033/},
  note = {Source identifier: 4680033}
}