@misc{indiciae9d4bf0004785,
  title = {[Extra cardiac sound caused by implanted pacemaker].},
  author = {P L Siqueira and P Schlesinger and A B Benchimol},
  year = {1975},
  url = {https://pubmed.ncbi.nlm.nih.gov/812463/},
  note = {Source identifier: 812463}
}