RecruitingProcedureA Study to Develop a Blood-based Test for Aiding the Diagnosis/Prognosis of Traumatic Brain Injury in Adults and for Monitoring the Development of Secondary Events in Patients Diagnosed With Traumatic Brain InjuryThe study is intended to cover two purposes: first, to develop a blood-based biomarker test for aiding the diagnosis of traumatic brain injury (TBI) in adult participants and for prognosis of outcome of TBI (CLIN12.1); and second, for monitoring the development of secondary events in adult participants diagnosed with TBI (CLIN12.2).