@article{annweiler2009-19659751,
  author  = {Annweiler, C. and Allali, G. and Allain, P. and Bridenbaugh, S. and Schott, A. M. and Kressig, R. W. and Beauchet, O.},
  title   = {{Vitamin D and cognitive performance in adults: a systematic review}},
  journal = {European journal of neurology},
  year    = {2009},
  doi     = {10.1111/j.1468-1331.2009.02755.x},
  pmid    = {19659751},
  url     = {https://doi.org/10.1111/j.1468-1331.2009.02755.x}
}