@misc{indiciae220ae7e5120e,
  title = {Propensity scores: help or hype?},
  author = {Wolfgang C Winkelmayer and Tobias Kurth},
  year = {2004},
  doi = {10.1093/ndt/gfh104},
  url = {https://pubmed.ncbi.nlm.nih.gov/15069182/},
  note = {Source identifier: 15069182}
}