@misc{indiciae4e89b6de285c,
  title = {PD and the Columbia Scale.},
  author = {G K Montgomery},
  year = {1984},
  doi = {10.1212/wnl.34.4.557-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/6538321/},
  note = {Source identifier: 6538321}
}