@misc{indiciaee040287beab4,
  title = {PSRO's--pros and cons.},
  author = {C E Welch},
  year = {1974},
  doi = {10.1056/nejm197406062902313},
  url = {https://pubmed.ncbi.nlm.nih.gov/4857132/},
  note = {Source identifier: 4857132}
}