@misc{indiciaef069c0a9d5ac,
  title = {Estimation of direct causal effects.},
  author = {Maya L Petersen and Sandra E Sinisi and Mark J van der Laan},
  year = {2006},
  doi = {10.1097/01.ede.0000208475.99429.2d},
  url = {https://pubmed.ncbi.nlm.nih.gov/16617276/},
  note = {Source identifier: 16617276}
}