High Resolution M-Mode Evaluation of Jugular Vein Valves in Patients with Neurological and Neurosensory Disorders. Zamboni et al, Curr Neurovasc Res. Oct 2017

"...CONCLUSIONS:

In patients with a miscellaneous of neurological disorders a significant higher rate of defective valves was found respect to HC. The latter condition is strongly associated to brain outflow abnormalities described in CCSVI condition...."
https://www.ncbi.nlm.nih.gov/pubmed/28982329