@misc{indiciae59143bcc29ea,
  title = {Frequent-flyer programs for drug prescribing.},
  author = {J Graves},
  year = {1987},
  doi = {10.1056/nejm198707233170418},
  url = {https://pubmed.ncbi.nlm.nih.gov/3600718/},
  note = {Source identifier: 3600718}
}