@article{levy1998-9706539,
  author  = {Levy, M. L. and Cummings, J. L. and Fairbanks, L. A. and Masterman, D. and Miller, B. L. and Craig, A. H. and Paulsen, J. S. and Litvan, I.},
  title   = {{Apathy is not depression}},
  journal = {The Journal of neuropsychiatry and clinical neurosciences},
  year    = {1998},
  doi     = {10.1176/jnp.10.3.314},
  pmid    = {9706539},
  url     = {https://doi.org/10.1176/jnp.10.3.314}
}