Cognitive motor interference during walking in multiple sclerosis using an alternate letter alphabet task. Learmonth YC, Sandroff BM, Pilutti LA, Klaren R, Ensari I, Riskin BJ, Holtzer R, Motl RW Arch Phys Med Rehabil. 2014 Mar 26. PMID: 24681387. Abstract CommentRecommendBookmarkWatch