@article{valenzuela2009-19225276,
  author  = {Valenzuela, M. and Sachdev, P.},
  title   = {{Can cognitive exercise prevent the onset of dementia? Systematic review of randomized clinical trials with longitudinal follow-up}},
  journal = {The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry},
  year    = {2009},
  doi     = {10.1097/jgp.0b013e3181953b57},
  pmid    = {19225276},
  url     = {https://doi.org/10.1097/jgp.0b013e3181953b57}
}