@misc{indiciae7c5ea4b792b1,
  title = {Estimating average regression effect under non-proportional hazards.},
  author = {R Xu and J O'Quigley},
  year = {2000},
  doi = {10.1093/biostatistics/1.4.423},
  url = {https://pubmed.ncbi.nlm.nih.gov/12933565/},
  note = {Source identifier: 12933565}
}