@misc{indiciae81f51c197801,
  title = {Multi-state models for event history analysis.},
  author = {Per Kragh Andersen and Niels Keiding},
  year = {2002},
  doi = {10.1191/0962280202sm276ra},
  url = {https://pubmed.ncbi.nlm.nih.gov/12040698/},
  note = {Source identifier: 12040698}
}