Canadian Concussion Collaborative
https://casem-acmse.org/wp-content/uploads/2018/06/5-key-messages-from-Berlin_ENG-1.pdf
The Concussion Recognition Tool 5th Edition (CRT5) (2017)
https://bjsm.bmj.com/content/51/11/851
British Journal of Sports Medicine
https://bjsm.bmj.com/content/51/11/838