PT - JOURNAL ARTICLE AU - J Stone TI - Commentary AID - 10.1136/jnnp.2008.165910 DP - 2009 Feb 01 TA - Practical Neurology PG - 15--15 VI - 9 IP - 1 4099 - http://pn.bmj.com/content/9/1/15.short 4100 - http://pn.bmj.com/content/9/1/15.full SO - Pract Neurol2009 Feb 01; 9