The Investigation of blunt head trauma page has been updated with additional information regarding the predictive ability of clinical findings and decision rules following the publication of the following article
Easter, JS, Haukoos, JS, Meehan, WP, et al. Will neuroimaging reveal a severe intracranial injury in this adult with minor head trauma?: The rational clinical examination systematic review. JAMA 2015;314(24):2672-81. http://dx.doi.org/10.1001/jama.2015.16316.