Axonal injury in the cerebral normal-appearing white matter of patients with multiple sclerosis is related to concurrent demyelination in lesions but not to concurrent demyelination in normal-appearing white matter. - Sridar Narayanan; Simon J. Francis; John G. Sled; A. C. Santos; Samson Antel; Ives R. Levesque; Steven Brass; Yves Lapierre; Dominique Sappey-Marinier; G. Bruce Pike; Douglas L. Arnold (NeuroImage, 2006)