@misc{indiciaee2588ecad5c4,
  title = {Instruments for causal inference: an epidemiologist's dream?},
  author = {Miguel A Hernán and James M Robins},
  year = {2006},
  doi = {10.1097/01.ede.0000222409.00878.37},
  url = {https://pubmed.ncbi.nlm.nih.gov/16755261/},
  note = {Source identifier: 16755261}
}