@misc{indiciaec6b4a08f3213,
  title = {Estimating historical changes in physical activity levels.},
  author = {G J Egger and N Vogels and K R Westerterp},
  doi = {10.5694/j.1326-5377.2001.tb143758.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/11837872/},
  note = {Source identifier: 11837872}
}