PT - JOURNAL ARTICLE AU - Massimo Filippi AU - Maria A. Rocca TI - Dirty-Appearing White Matter: A Disregarded Entity in Multiple Sclerosis AID - 10.3174/ajnr.A1834 DP - 2009 Oct 15 TA - American Journal of Neuroradiology 4099 - http://www.ajnr.org/content/early/2009/10/15/ajnr.A1834.short 4100 - http://www.ajnr.org/content/early/2009/10/15/ajnr.A1834.full