@misc{indiciae46a1d066e74c,
  title = {Cardiorespiratory variables in middle-aged men.},
  author = {M N Schmidt and J P Wrenn and E Vlahov},
  year = {1977},
  url = {https://pubmed.ncbi.nlm.nih.gov/907450/},
  note = {Source identifier: 907450}
}