RT Journal Article SR Electronic T1 Editor's choice JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 311 OP 311 DO 10.1136/jnnp.2009.197814 VO 9 IS 6 A1 Warlow, Charles YR 2009 UL http://pn.bmj.com/content/9/6/311.abstract AB