@article{fang2018-30342524,
  author  = {Fang, W. L. and Jiang, M. J. and Gu, B. B. and Wei, Y. M. and Fan, S. N. and Liao, W. and Zheng, Y. Q. and Liao, S. W. and others},
  title   = {{Tooth loss as a risk factor for dementia: systematic review and meta-analysis of 21 observational studies}},
  journal = {BMC psychiatry},
  year    = {2018},
  doi     = {10.1186/s12888-018-1927-0},
  pmid    = {30342524},
  url     = {https://doi.org/10.1186/s12888-018-1927-0}
}