@article{botha2015-26103600,
  author  = {Botha, H. and Duffy, JR. and Whitwell, J. L. and Strand, E. A. and Machulda, M. M. and Schwarz, C. G. and Reid, R. I. and Spychalla, A. J. and others},
  title   = {{Classification and clinicoradiologic features of primary progressive aphasia (PPA) and apraxia of speech}},
  journal = {Cortex; a journal devoted to the study of the nervous system and behavior},
  year    = {2015},
  doi     = {10.1016/j.cortex.2015.05.013},
  pmid    = {26103600},
  url     = {https://doi.org/10.1016/j.cortex.2015.05.013}
}