@article{smith2016-27431367,
  author  = {Smith, A. D. and Refsum, H.},
  title   = {{Homocysteine, B Vitamins, and Cognitive Impairment}},
  journal = {Annual review of nutrition},
  year    = {2016},
  doi     = {10.1146/annurev-nutr-071715-050947},
  pmid    = {27431367},
  url     = {https://doi.org/10.1146/annurev-nutr-071715-050947}
}