@misc{indiciaefa295d3c918a,
  title = {Few smokers develop COPD. Why?},
  author = {N M Siafakas and E G Tzortzaki},
  year = {2002},
  doi = {10.1053/rmed.2002.1318},
  url = {https://pubmed.ncbi.nlm.nih.gov/12195843/},
  note = {Source identifier: 12195843}
}