| http://www.w3.org/ns/prov#value | - Our results indicate that only 18.9% of patients with MS, and 10% with CIS presented with CCSVI. We further found CCSVI to be significantly more frequent among MS patients with longer disease duration, and in patients with the progressive forms of MS. According to these observations, CCSVI could be subsequent to the disease onset, making impossible to exclude a possible ???reverse causality?
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