Chronic cerebrospinal venous insufficiency and multiple sclerosis: a comprehensive meta-analysis of case-control studies. Tsivgoulis G, Sergentanis TN, Chan A, Voumvourakis K, Triantafyllou N, Psaltopoulou T, Gold R, Krogias C Ther Adv Neurol Disord. 2014 Mar; 7(2):114-136. PMID: 24587827. Abstract CommentRecommendBookmarkWatch