Oes a cervical collar immobilization device improve patient outcomes?

This paper must have 3 scholarly sources. The paper is about the pre-hospital application of a cervical collar for immobilizing the cervical spine. An example of one of these devices is an AMBU PERFIT ACE Adjustable C-Collar. See this link for an example: AMBU-PERFIT-ACE-Adjustable-C-Collar