RT Journal Article SR Electronic T1 Head injury JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 50 OP 55 DO 10.1136/jnnp.2010.235705 VO 11 IS 1 A1 van Dijk, Gert W YR 2011 UL http://pn.bmj.com/content/11/1/50.abstract AB