In 2014, A 3-year retrospective review of the Effect of THC use on Traumatic Brain Injury
BACKGROUND: This study was to establish a relationship between tetrahydrocannabinol (THC) and mortality due to a TBI.
You can read the full article here => http://www.ingentaconnect.com/content/sesc/tas/2014/00000080/00000010/art00015