@misc{indiciae5472bd0b91f6,
  title = {Robbie's Fox cards.},
  author = {J Howie},
  doi = {10.1136/bmj.299.6715.1581},
  url = {https://pubmed.ncbi.nlm.nih.gov/2514923/},
  note = {Source identifier: 2514923}
}