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In a study of extracranial and transcranial color-coded sonography, there was no impairment of cerebral venous drainage in patients with multiple sclerosis as compared to healthy controls.

Chronic Cerebrospinal Venous Insufficiency in Multiple Sclerosis Patients Is Challenged

In a study of extracranial and transcranial color-coded sonography, there was no impairment of cerebral venous drainage in patients with multiple sclerosis as compared to healthy controls.