Smoking and Risk of Multiple Sclerosis: Evidence of Modification by NAT1 Variants. Briggs FBS, Acuna B, Shen L, Ramsay P, Quach H, Bernstein A, Bellesis KH, Kockum IS, Hedström AK, Alfredsson L, et al. Epidemiology. 2014 Mar 12. PMID: 24625537. Abstract CommentRecommendBookmarkWatch