@article{elgh2009-19538208,
  author  = {Elgh, E. and Domellöf, M. and Linder, J. and Edström, M. and Stenlund, H. and Forsgren, L.},
  title   = {{Cognitive function in early Parkinson's disease: a population-based study}},
  journal = {European journal of neurology},
  year    = {2009},
  doi     = {10.1111/j.1468-1331.2009.02707.x},
  pmid    = {19538208},
  url     = {https://doi.org/10.1111/j.1468-1331.2009.02707.x}
}