@misc{indiciaea7fa2d8da5a1,
  title = {Ambulatory accelerometry to quantify motor behaviour in patients after failed back surgery: a validation study.},
  author = {J B Bussmann and Y M van de Laar and M P Neeleman and H J Stam},
  year = {1998},
  doi = {10.1016/s0304-3959(97)00161-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/9520229/},
  note = {Source identifier: 9520229}
}