Following the publication of the Symposium Paper by Robert J Fox, Tamar E Bacon, Eric Chamot, Amber R Salter, Gary R Cutter, Jennifer T Kalina & Ilya Kister titled ‘Prevalence of multiple sclerosis symptoms across lifespan: data from the NARCOMS Registry’ in the December 2015 Supplement issue of Neurodegenerative Disease Management (Neurodegener. Dis. Manag. 5 [6s], 3–10 [2015]), the authors inadvertently omitted acknowledgement of a registered copyright for the Performance Scales. See Performance Scales, Copyright Registration Number/Date: TXu000743629/1996-04-04; assigned to DeltaQuest Foundation, Inc., effective October 1, 2005. US Copyright law governs terms of use.
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