@article{koivunen2011-21325653,
  author  = {Koivunen, J. and Scheinin, N. and Virta, JR. and Aalto, S. and Vahlberg, T. and Någren, K. and Helin, S. and Parkkola, R. and others},
  title   = {{Amyloid PET imaging in patients with mild cognitive impairment: a 2-year follow-up study}},
  journal = {Neurology},
  year    = {2011},
  doi     = {10.1212/wnl.0b013e318212015e},
  pmid    = {21325653},
  url     = {https://doi.org/10.1212/wnl.0b013e318212015e}
}