@misc{indiciaec7411aee4f4d,
  title = {A practical billing and payment plan for cognitive services.},
  author = {D B Christensen and W E Fassett and G A Andrews},
  year = {1993},
  doi = {10.1016/s0160-3450(15)30830-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/8475845/},
  note = {Source identifier: 8475845}
}