Figure 1From: Efficacy and safety of venous angioplasty of the extracranial veins for multiple sclerosis. Brave dreams study (brain venous drainage exploited against multiple sclerosis): study protocol for a randomized controlled trial Meta-analysis of diagnosis of chronic cerebrospinal venous insufficiency (presence of at least two parameters according to Zamboni criteria in patients with multiple sclerosis (MS)) versus healthy controls. Back to article page