Physical Activity in Multiple Sclerosis: A Comparative Study of Vitamin D, Brain-Derived Neurotrophic Factor and Regulatory T Cell Populations. Waschbisch A, Wenny I, Tallner A, Schwab S, Pfeifer K, Mäurer M Eur Neurol. 2012 Jul 19; 68(2):122-128. Epub 2012 Jul 19. PMID: 22832849. Abstract CommentRecommendBookmarkWatch