title: History, history, history.
authors.affiliation: BMJ Learning, BMJ Knowledge, BMA House, London WCIH 9JR, UK.
authors.forename: Kieran
authors.initials: K
authors.lastname: Walsh
mesh_terms: D000368:Aged; D006259:Craniocerebral Trauma / Q000000981:diagnostic imaging* / Q000517:prevention & control; D006261:Headache / Q000000981:diagnostic imaging* / Q000188:drug therapy / Q000517:prevention & control; D006801:Humans; D008297:Male; D008487:Medical History Taking; D011481:Protective Clothing; D011859:Radiography