@misc{indiciae22ebab8ddd6c,
  title = {Lung function tests and a 'vertical' P wave axis in the electrocardiogram.},
  author = {T T Chapman},
  year = {1974},
  doi = {10.1136/thx.29.1.106},
  url = {https://pubmed.ncbi.nlm.nih.gov/4825541/},
  note = {Source identifier: 4825541}
}