Retrograde amnesia: delayed forgetting after concussion.
D000647:Amnesia / Q000209:etiology*; D001265:Athletic Injuries / Q000150:complications; D001924:Brain Concussion / Q000150:complications*; D006801:Humans; D008297:Male; D008570:Memory, Short-Term; D009460:Neurologic Examination; D013178:Sports Medicine; D013997:Time Factors