@misc{indiciae305943c6d152,
  title = {Additional factors in chronic bronchitis.},
  author = {K J Cullen and J Elder and A R Adams and N S Stenhouse},
  year = {1970},
  doi = {10.1136/bmj.1.5693.394},
  url = {https://pubmed.ncbi.nlm.nih.gov/5434657/},
  note = {Source identifier: 5434657}
}