Chronic cerebrospinal venous insufficiency is not associated with multiple sclerosis and its severity: a blind-verified study. Leone MA, Raymkulova O, Naldi P, Lochner P, Bolamperti L, Coppo L, Stecco A, Liboni W PLoS One. 2013; 8(2):e56031. Epub 2013 Feb 13. PMID: 23418501. Abstract CommentRecommendBookmarkWatch