@misc{indiciae0b363dde2412,
  title = {Physical activity and changes in mobility in older persons.},
  author = {John Hay},
  year = {2004},
  doi = {10.1097/00042752-200407000-00016},
  url = {https://pubmed.ncbi.nlm.nih.gov/15273539/},
  note = {Source identifier: 15273539}
}