@misc{indiciae3da2b3e63798,
  title = {Primary pulmonary hypertension.},
  author = {S M Factor and J Reichel},
  year = {1980},
  doi = {10.1016/0002-8703(80)90631-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/6445679/},
  note = {Source identifier: 6445679}
}