@misc{indiciaef0932172570d,
  title = {Letter: Mechanisms affecting "closing-capacity" test.},
  author = {P T Macklem},
  year = {1974},
  doi = {10.1056/nejm197409262911317},
  url = {https://pubmed.ncbi.nlm.nih.gov/4852850/},
  note = {Source identifier: 4852850}
}