@misc{indiciae9cd7ed94c223,
  title = {Introduction to a new inspiratory threshold loading device.},
  author = {R C Chen and C L Que and S Yan},
  year = {1998},
  doi = {10.1183/09031936.98.12010208},
  url = {https://pubmed.ncbi.nlm.nih.gov/9701439/},
  note = {Source identifier: 9701439}
}