@article{bickel2008-18577850,
  author  = {Bickel, H. and Gradinger, R. and Kochs, E. and Förstl, H.},
  title   = {{High risk of cognitive and functional decline after postoperative delirium. A three-year prospective study}},
  journal = {Dementia and geriatric cognitive disorders},
  year    = {2008},
  doi     = {10.1159/000140804},
  pmid    = {18577850},
  url     = {https://doi.org/10.1159/000140804}
}