RT Journal Article SR Electronic T1 Commentary JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 15 OP 15 DO 10.1136/jnnp.2008.165910 VO 9 IS 1 A1 Stone, J YR 2009 UL http://pn.bmj.com/content/9/1/15.abstract AB