@article{butler2018-29255842,
  author  = {Butler, M. and McCreedy, E. and Nelson, V. A. and Desai, P. and Ratner, E. and Fink, H. A. and Hemmy, L. S. and McCarten, JR. and others},
  title   = {{Does Cognitive Training Prevent Cognitive Decline?: A Systematic Review}},
  journal = {Annals of internal medicine},
  year    = {2018},
  doi     = {10.7326/m17-1531},
  pmid    = {29255842},
  url     = {https://doi.org/10.7326/m17-1531}
}