RT Journal Article SR Electronic T1 A decision rule with 7 clinical criteria identified patients with minor head injury who did not need computed tomography JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 62 OP 62 DO 10.1136/ebm.6.2.62 VO 6 IS 2 YR 2001 UL http://ebm.bmj.com/content/6/2/62.abstract AB