PT - JOURNAL ARTICLE ED - , TI - EXPERT ddx Head and Neck AID - 10.3174/ajnr.A1765 DP - 2009 Jul 30 TA - American Journal of Neuroradiology 4099 - http://www.ajnr.org/content/early/2009/07/30/ajnr.A1765.short 4100 - http://www.ajnr.org/content/early/2009/07/30/ajnr.A1765.full