Biochemical Diagnostics of Mild Traumatic Brain Injury (TBI) and Concussion in Children and Adolescents

Inclusion Criteria: * The subject is suspected of having an isolated mild TBI (Glasgow Coma Score 13 - 15) * No more that 6 hours elapsed from the incident of injury at the first sampling * The patient is conscious * Informed consent received from the legal guardian, and the subject him-/herself when literate and capable of understanding study measures Exclusion Criteria: * More than 6 hours elapsed from the injury, or unknown time of trauma * Multi-trauma patient * History of head injury, seizures or stroke within three preceding months * Chronic neurodegenerative, metabolic or autoimmune disease * Known existing neurological condition