@misc{indiciaeffa020550135,
  title = {Analysis of blood donor return behaviour using survival regression methods.},
  author = {R C James and D E Matthews},
  year = {1996},
  doi = {10.1046/j.1365-3148.1996.d01-46.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/8696444/},
  note = {Source identifier: 8696444}
}