PT - JOURNAL ARTICLE ED - American Society of Neuroradiology TI - Erratum AID - 10.3174/ajnr.A1968 DP - 2009 Dec 03 TA - American Journal of Neuroradiology 4099 - http://www.ajnr.org/content/early/2009/12/03/ajnr.A1968.short 4100 - http://www.ajnr.org/content/early/2009/12/03/ajnr.A1968.full