Catechol-O-Methyltransferase Val158Met Polymorphism (rs4680) Is Associated With Pain in Multiple Sclerosis. Fernández-de-Las-Peñas C, Ambite-Quesada S, Ortíz-Gutiérrez R, Ortega-Santiago R, Gil-Crujera A, Caminero AB J Pain. 2013 Dec; 14(12):1719-23. Epub 2013 Sep 28. PMID: 24290452. Abstract CommentRecommendBookmarkWatch