@misc{indiciae0d2afa46fa04,
  title = {Two-level proportional hazards models.},
  author = {Jerry J Maples and Susan A Murphy and William G Axinn},
  year = {2002},
  doi = {10.1111/j.0006-341x.2002.00754.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/12495129/},
  note = {Source identifier: 12495129}
}