@misc{indiciae719cfe86fb54,
  title = {Physiological patterns in early morning asthma.},
  author = {M R Hetzel and T J Clark and K Houston},
  year = {1977},
  doi = {10.1136/thx.32.4.418},
  url = {https://pubmed.ncbi.nlm.nih.gov/563112/},
  note = {Source identifier: 563112}
}