@misc{indiciaec749aa05a2e7,
  title = {Physical activity and the immune system.},
  author = {R J Shephard and T J Verde and S G Thomas and P Shek},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/1655191/},
  note = {Source identifier: 1655191}
}