@article{aarsland2017-28257128,
  author  = {Aarsland, D. and Creese, B. and Politis, M. and Chaudhuri, K. R. and Ffytche, D. H. and Weintraub, D. and Ballard, C.},
  title   = {{Cognitive decline in Parkinson disease}},
  journal = {Nature reviews. Neurology},
  year    = {2017},
  doi     = {10.1038/nrneurol.2017.27},
  pmid    = {28257128},
  url     = {https://doi.org/10.1038/nrneurol.2017.27}
}