@article{swinnen2014-25311585,
  author  = {Swinnen, B. and Robberecht, W.},
  title   = {{The phenotypic variability of amyotrophic lateral sclerosis}},
  journal = {Nature reviews. Neurology},
  year    = {2014},
  doi     = {10.1038/nrneurol.2014.184},
  pmid    = {25311585},
  url     = {https://doi.org/10.1038/nrneurol.2014.184}
}