@misc{indiciae1a85fef30037,
  title = {Looking through a bubble.},
  author = {P J Gray},
  year = {1993},
  doi = {10.1136/bmj.306.6873.337-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/8461672/},
  note = {Source identifier: 8461672}
}