@misc{indiciae9d018490afa2,
  title = {Assessing the chronic bronchitis.},
  author = {D Needham},
  year = {1968},
  doi = {10.1016/s0140-6736(68)92797-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4169799/},
  note = {Source identifier: 4169799}
}