@misc{indiciae6e9692445a5c,
  title = {Normal electrocardiographic waveform characteristics during treadmill exercise testing.},
  author = {R A Wolthuis and V F Froelicher and A Hopkirk and J R Fischer and N Keiser},
  year = {1979},
  doi = {10.1161/01.cir.60.5.1028},
  url = {https://pubmed.ncbi.nlm.nih.gov/487536/},
  note = {Source identifier: 487536}
}