In the article “Changed Histone Acetylation Patterns in Normal-Appearing White Matter and Early Multiple Sclerosis Lesions,” by Xiomara Pedre, Fabrizio Mastronardi, Wolfgang Bruck, Gerardo López-Rodas, Tanja Kuhlmann, and Patrizia Casaccia, which appeared on pages 3435–3445 of the March 2, 2011 issue, the name of the affiliation for Dr. Mastronardi was spelled incorrectly. It should have read “Inceptum Research & Therapeutics.”