@article{tractenberg2011-21526188,
  author  = {Tractenberg, R. E. and Pietrzak, R. H.},
  title   = {{Intra-individual variability in Alzheimer's disease and cognitive aging: definitions, context, and effect sizes}},
  journal = {PloS one},
  year    = {2011},
  doi     = {10.1371/journal.pone.0016973},
  pmid    = {21526188},
  url     = {https://doi.org/10.1371/journal.pone.0016973}
}