@misc{indiciae6da93ba4bb53,
  title = {Two views of PSRO.},
  author = {F I Clare},
  year = {1977},
  doi = {10.1056/nejm197711032971820},
  url = {https://pubmed.ncbi.nlm.nih.gov/561891/},
  note = {Source identifier: 561891}
}