@article{ball2002-12425704,
  author  = {Ball, K. and Berch, D. B. and Helmers, K. F. and Jobe, J. B. and Leveck, M. D. and Marsiske, M. and Morris, J. N. and Rebok, G. W. and others},
  title   = {{Effects of cognitive training interventions with older adults: a randomized controlled trial}},
  journal = {JAMA},
  year    = {2002},
  doi     = {10.1001/jama.288.18.2271},
  pmid    = {12425704},
  url     = {https://doi.org/10.1001/jama.288.18.2271}
}