@misc{indiciae9ce3ae7cb791,
  title = {No cumulative effects for one or two previous concussions.},
  author = {G L Iverson and B L Brooks and M R Lovell and M W Collins},
  year = {2006},
  doi = {10.1136/bjsm.2005.020651},
  url = {https://pubmed.ncbi.nlm.nih.gov/16371496/},
  note = {Source identifier: 16371496}
}