@misc{indiciae1f8848e1e5bb,
  title = {Statistics Notes: Validating scales and indexes.},
  author = {J Martin Bland and Douglas G Altman},
  year = {2002},
  doi = {10.1136/bmj.324.7337.606},
  url = {https://pubmed.ncbi.nlm.nih.gov/11884331/},
  note = {Source identifier: 11884331}
}