British Journal of Sports Medicine
https://bjsm.bmj.com/content/53/8/495
BC Medical Journal
https://www.bcmj.org/worksafebc/concussions-and-return-work-considerations
British Journal of Sports Medicine
https://bjsm.bmj.com/content/47/1/15
British Journal of Sports Medicine (BJSM)
https://www.ncbi.nlm.nih.gov/pubmed/29500251/
Pediatrics & Child Health
https://academic.oup.com/pch/advance-article/doi/10.1093/pch/pxy171/5280075
Frontiers in Neurology
https://www.frontiersin.org/articles/10.3389/fneur.2018.01115/full
BMC Medical Education
https://bmcmededuc.biomedcentral.com/articles/10.1186/s12909-018-1416-7
Clinical Journal of Sport Medicine
https://journals.lww.com/cjsportsmed/Fulltext/2020/11000/CDC_Guideline_on_Mild_Traumatic_Brain_Injury_in.14.aspx
American Academy of Pediatrics
http://pediatrics.aappublications.org/content/early/2018/11/08/peds.2018-3074
British Journal of Sports Medicine
https://bjsm.bmj.com/content/51/12/978