@misc{indiciae3d65ac3018d7,
  title = {Performance indicator for subject motivation in respiratory tests.},
  author = {A D Cunningham and N L Gregory and T H Mcdonald and A Shaw},
  year = {1979},
  doi = {10.1007/bf02440954},
  url = {https://pubmed.ncbi.nlm.nih.gov/86662/},
  note = {Source identifier: 86662}
}