Socioeconomic Factors in Childhood and the Risk of Multiple Sclerosis. Nielsen N M, Jørgensen KT, Bager P, Stenager E, Pedersen BV, Hjalgrim H, Koch-Henriksen N, Frisch M Am J Epidemiol. 2013 May 9. PMID: 23660795. Abstract CommentRecommendBookmarkWatch