@misc{indiciae304dd19764e8,
  title = {Principal stratification in causal inference.},
  author = {Constantine E Frangakis and Donald B Rubin},
  year = {2002},
  doi = {10.1111/j.0006-341x.2002.00021.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/11890317/},
  note = {Source identifier: 11890317}
}