@article{langa2020-31563909,
  author  = {Langa, K. M. and Ryan, L. H. and McCammon, R. J. and Jones, R. N. and Manly, J. J. and Levine, D. A. and Sonnega, A. and Farron, M. and others},
  title   = {{The Health and Retirement Study Harmonized Cognitive Assessment Protocol Project: Study Design and Methods}},
  journal = {Neuroepidemiology},
  year    = {2020},
  doi     = {10.1159/000503004},
  pmid    = {31563909},
  url     = {https://doi.org/10.1159/000503004}
}