@misc{indiciae38d3bf91a916,
  title = {ALS surrogate markers. MRS.},
  author = {S Kalra and D L Arnold},
  year = {2004},
  doi = {10.1080/17434470410019861},
  url = {https://pubmed.ncbi.nlm.nih.gov/15512889/},
  note = {Source identifier: 15512889}
}