@misc{indiciae413722ec17f6,
  title = {Confounding in air pollution epidemiology: when does two-stage regression identify the problem?},
  author = {A H Marcus and S R Kegler},
  year = {2001},
  doi = {10.1289/ehp.011091193},
  url = {https://pubmed.ncbi.nlm.nih.gov/11748025/},
  note = {Source identifier: 11748025}
}