@misc{indiciae6f6e70172ea2,
  title = {PSROs' background and perspective.},
  author = {G L Ellis},
  year = {1975},
  doi = {10.1016/s0001-2092(07)62803-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/1041221/},
  note = {Source identifier: 1041221}
}