Schelling, Franz, and Hector Ferral. “How to Prevent Further Chronic Cerebrospinal Venous Insufficiency in Multiple Sclerosis Misadventures?”. Veins and Lymphatics 3, no. 1 (July 31, 2014). Accessed April 28, 2024. https://www.pagepressjournals.org/vl/article/view/vl.2014.4647.