@misc{indiciae06db4d5e053d,
  title = {Roles, tasks and practitioners.},
  author = {D Levinson},
  year = {1977},
  doi = {10.1056/nejm197706022962214},
  url = {https://pubmed.ncbi.nlm.nih.gov/16211/},
  note = {Source identifier: 16211}
}