In patients with multiple sclerosis (MS), Zamboni et al[1][1] described anomalies of venous outflow at color Doppler high-resolution examination and multiple severe extracranial stenosis at venography, affecting the internal jugular, the vertebral, and the azygous veins. The authors focused their
Omar Khan, Massimo Filippi, Mark S. Freedman, Frederik Barkhof, Paula Dore‐Duffy, Hans Lassmann, Bruce D. Trapp, Amit Bar‐Or, Imad Zak, Marilyn J. Siegel, Robert P. Lisak
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