@misc{indiciae07349e11af64,
  title = {Vertical or horizontal visual analogue scales.},
  author = {J Scott and E C Huskisson},
  year = {1979},
  doi = {10.1136/ard.38.6.560},
  url = {https://pubmed.ncbi.nlm.nih.gov/317239/},
  note = {Source identifier: 317239}
}