@misc{indiciae2857f86bcdfc,
  title = {Participation in extracurricular physical activity programs at middle schools.},
  author = {Holly S Powers and Terry L Conway and Thomas L McKenzie and James F Sallis and Simon J Marshall},
  year = {2002},
  doi = {10.1080/02701367.2002.10609007},
  url = {https://pubmed.ncbi.nlm.nih.gov/12092893/},
  note = {Source identifier: 12092893}
}