@misc{indiciaef91973ebbaf7,
  title = {Testing for crossover of two hazard functions using Gail and Simon's method.},
  author = {Y H Joshua Chen and G H Frank Liu},
  year = {2006},
  doi = {10.1080/10543400600614791},
  url = {https://pubmed.ncbi.nlm.nih.gov/16724487/},
  note = {Source identifier: 16724487}
}