@misc{indiciaeb545b957b92c,
  title = {The pulmonary clock.},
  author = {M R Hetzel},
  year = {1981},
  doi = {10.1136/thx.36.7.481},
  url = {https://pubmed.ncbi.nlm.nih.gov/7031967/},
  note = {Source identifier: 7031967}
}