@article{ropper1980-6446047,
  author  = {Ropper, A. H. and Williams, R. S.},
  title   = {{Relationship between plaques, tangles, and dementia in Down syndrome}},
  journal = {Neurology},
  year    = {1980},
  doi     = {10.1212/wnl.30.6.639},
  pmid    = {6446047},
  url     = {https://doi.org/10.1212/wnl.30.6.639}
}