@misc{indiciae699910114bbf,
  title = {Interaction revisited: the difference between two estimates.},
  author = {Douglas G Altman and J Martin Bland},
  year = {2003},
  doi = {10.1136/bmj.326.7382.219},
  url = {https://pubmed.ncbi.nlm.nih.gov/12543843/},
  note = {Source identifier: 12543843}
}