@misc{indiciae486e19830e56,
  title = {Letter: Ventricular premature contractions and A-V conduction. II.},
  author = {H O Klein},
  year = {1975},
  doi = {10.1016/0002-9149(75)90069-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/47707/},
  note = {Source identifier: 47707}
}