@misc{indiciae3f6cf7693fc1,
  title = {No charge for unique service.},
  author = {J A Duley},
  year = {1993},
  doi = {10.1136/bmj.306.6891.1543-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/8518703/},
  note = {Source identifier: 8518703}
}