@misc{indiciaeeb814ad970f0,
  title = {Interpreting PRO: from strategy to structure.},
  author = {J R Hsu and H S Cairns},
  year = {1990},
  doi = {10.1111/j.1749-6632.1990.tb12188.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2375568/},
  note = {Source identifier: 2375568}
}