title: Evidence does not support concussion grading.
authors.forename: William
authors.initials: W
authors.lastname: Vollmar
mesh_terms: D001924:Brain Concussion / Q000145:classification* / Q000175:diagnosis / Q000628:therapy; D006801:Humans; D009460:Neurologic Examination; D020127:Recovery of Function; D012720:Severity of Illness Index; D013177:Sports; D013178:Sports Medicine