@misc{indiciae593aa548919c,
  title = {Concealed quadrigeminy.},
  author = {M M Aygen and H Dean and H Almog},
  year = {1981},
  doi = {10.1159/000173262},
  url = {https://pubmed.ncbi.nlm.nih.gov/6166378/},
  note = {Source identifier: 6166378}
}