@misc{indiciaebc0ef3e82a20,
  title = {Does a normal isotope perfusion scan exclude pulmonary embolism?},
  author = {R H Greenspan},
  doi = {10.1097/00004424-197303000-00008},
  url = {https://pubmed.ncbi.nlm.nih.gov/4690958/},
  note = {Source identifier: 4690958}
}