Prolonged-release fampridine treatment improved subject-reported impact of multiple sclerosis: Item-level analysis of the MSIS-29.

Gasperini C, Hupperts R, Lycke J, Short C, McNeill M, Zhong J, Mehta LR

J Neurol Sci. 2016 Nov 15; 370:123-131. PMID: 27772740. Abstract