@misc{indiciae6fefa53e02bd,
  title = {["QT" pacemaker in aggregate exchange. Do old electrodes impair functional ability?].},
  author = {M Sigmund and P Schwindke and S Recker and A Johnen and P Hanrath},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/2058250/},
  note = {Source identifier: 2058250}
}