@misc{indiciae7cc2c0742250,
  title = {Re: "A simple, valid step test for estimating maximal oxygen uptake in epidemiologic studies".},
  author = {C Witkov},
  year = {1993},
  doi = {10.1093/oxfordjournals.aje.a116698},
  url = {https://pubmed.ncbi.nlm.nih.gov/8460630/},
  note = {Source identifier: 8460630}
}