@misc{indiciae490f863e4c45,
  title = {Left ventricular function in chronic obstructive lung disease.},
  author = {G L Baum and A Schwartz and R Llamas and C Castillo},
  year = {1971},
  doi = {10.1056/nejm197108122850701},
  url = {https://pubmed.ncbi.nlm.nih.gov/4326623/},
  note = {Source identifier: 4326623}
}