@article{spackman2012-22175655,
  author  = {Spackman, D. E. and Kadiyala, S. and Neumann, P. J. and Veenstra, D. L. and Sullivan, S. D.},
  title   = {{Measuring Alzheimer disease progression with transition probabilities: estimates from NACC-UDS}},
  journal = {Current Alzheimer research},
  year    = {2012},
  doi     = {10.2174/156720512803569046},
  pmid    = {22175655},
  url     = {https://doi.org/10.2174/156720512803569046}
}