Correction - Volume 16, Issue 4 - December 2014

From the Publisher: The Publisher of IJMSC and the authors of “Natural History of Multiple Sclerosis Symptoms” (Ilya Kister, Tamar E. Bacon, Eric Chamot, et al., published in Volume 15, Number 3, pages 146–158) have come to learn of a filed copyright of the MS Performance Scales. See Performance Scales, Copyright Registration Number/Date: TXu000743629/1996-04-04; assigned to Delta Quest Foundation, Inc., effective October 1, 2005. U.S. Copyright law governs terms of use. The Publisher and the authors erred in publishing Appendix 1 and in misstating the absence of a filed copyright. Consequently, in the online edition of IJMSC at ijmsc.org, the originally published version of the article has been replaced with a revised version that does not include Appendix 1.