@misc{indiciae226e46191a3f,
  title = {[A permanent pacemaker with variable frequency].},
  author = {C Andersen and H Oxhøj and P Arnsbo},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2922840/},
  note = {Source identifier: 2922840}
}