@misc{indiciae9e55cf1ba957,
  title = {Confounding issues in COPD risk study?},
  author = {Ranjeeta Sinvhal and Lorraine Tosiello and Greg Cable},
  year = {2003},
  doi = {10.1378/chest.123.1.307},
  url = {https://pubmed.ncbi.nlm.nih.gov/12527640/},
  note = {Source identifier: 12527640}
}