@misc{indiciae11b2e7055833,
  title = {Professional services should be voluntary.},
  author = {L J Anderson},
  year = {1979},
  doi = {10.1016/s0160-3450(15)32219-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/517418/},
  note = {Source identifier: 517418}
}