@misc{indiciae010b08aa714e,
  title = {Control without separate controls: evaluation of vaccine safety using case-only methods.},
  author = {C P Farrington},
  year = {2004},
  doi = {10.1016/j.vaccine.2004.01.017},
  url = {https://pubmed.ncbi.nlm.nih.gov/15121324/},
  note = {Source identifier: 15121324}
}