@misc{indiciae5019244e8688,
  title = {[Physical activity has a certain positive effect on the skeleton].},
  author = {C Zetterberg and M Annerstedt and M Nordin and M L Skovron and J Zuckerman},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2233012/},
  note = {Source identifier: 2233012}
}