@misc{indiciae55049ddb6ece,
  title = {Retainer payment for physicians' services.},
  author = {A N Koplin},
  year = {1967},
  doi = {10.2105/ajph.57.8.1363},
  url = {https://pubmed.ncbi.nlm.nih.gov/6069012/},
  note = {Source identifier: 6069012}
}