RT Journal Article SR Electronic T1 Training and Learning Curve in Chronic Cerebrospinal Venous Insufficiency Assessment JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A3570 A1 Bavera, P.M. YR 2013 UL http://www.ajnr.org/content/early/2013/03/21/ajnr.A3570.abstract AB