@misc{indiciae9f936ba570c7,
  title = {An inexpensive electronic counting system for step tests.},
  author = {J McClements and J Belyk and B Rostad and P Jackson},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2331645/},
  note = {Source identifier: 2331645}
}