Error in Abstract. In the Original Contribution titled “Qualitative Estimates of Medial Temporal Atrophy as a Predictor of Progression From Mild Cognitive Impairment to Dementia,” published in the January issue of the ARCHIVES (2007;64:108-115), an error occurred in the abstract on page 108. In the last item of the abstract, the trial registration identifier should have been listed as NCT00000173. The online versions of this article on the Archives of Neurology Web site are correct.