In the article entitled Intracellular Accumulation of Amyloidogenic Fragments of Amyloid-β Precursor Protein in Neurons with Niemann-Pick Type C Defects Is Associated with Endosomal Abnormalities (Volume 164, pages 975–985), Feng-Shium Shie should have been listed as the second author. This author's institutional affiliation is Department of Pathology, University of Washington, Seattle, Washington. Please note that L.-W.J and F.-S.S. contributed equally and should be considered co-first authors of this article.