@misc{indiciae48bea473b24f,
  title = {Chronic bronchitis and emphysema.},
  author = {H Herxheimer},
  year = {1978},
  doi = {10.1136/bmj.1.6123.1348-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/647274/},
  note = {Source identifier: 647274}
}