"Canadian C-spine rule and the National Emergency X-Radiography Utilization Study (NEXUS) for detecting clinically important cervical spine injury following blunt trauma" (PDF). Cochrane Database of Systematic Reviews. doi:10.1002/14651858.CD012989. hdl:10453/128267. ISSN 1465-1858. ↑ Julie C Leonard (2018-02-12).