@misc{indiciaef93e0f0b2243,
  title = {Approximate variance formulas for standardized rate ratios.},
  author = {W D Flanders},
  year = {1984},
  doi = {10.1016/0021-9681(84)90028-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/6725499/},
  note = {Source identifier: 6725499}
}