PT - JOURNAL ARTICLE ED - , TI - Clarification AID - 10.1136/jnnp.2010.232371cl DP - 2011 Aug 01 TA - Journal of Neurology, Neurosurgery & Psychiatry PG - 944--944 VI - 82 IP - 8 4099 - http://jnnp.bmj.com/content/82/8/944.1.short 4100 - http://jnnp.bmj.com/content/82/8/944.1.full SO - J Neurol Neurosurg Psychiatry2011 Aug 01; 82