Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.Title[Commentary on] Obermann M, Nebel K, Schumann C, et al. Gray matter changes related to chronic post-traumatic headache. Neurology. 2009;73:978-983.AuthorsStillman MJ; Kaniecki RG; Taylor FRPublicationHeadache: The Journal of Head & Face Pain, 2010, Vol 50, Issue 2, p330ISSN0017-8748Publication typeJournal ArticleDOI10.1111/j.1526-4610.2009.01599.x