@misc{indiciae27c2374b105e,
  title = {Primary pulmonary hypertension.},
  author = {A P Fishman and G G Pietra},
  year = {1980},
  doi = {10.1146/annurev.me.31.020180.002225},
  url = {https://pubmed.ncbi.nlm.nih.gov/6994621/},
  note = {Source identifier: 6994621}
}