The BNAC Advisory Council has a summary of the research paper
“Risk factors for chronic cerebrospinal venous insufficiency (CCSVI) in a large cohort of volunteers” that was published in PLoS One.
This preliminary University at Buffalo study of 252 volunteers finds an association between CCSVI and as many as three characteristics widely viewed as possible or confirmed MS risk factors. They are: infectious mononucleosis, irritable bowel syndrome and smoking.
Note that the PloS paper is free access. URL links to the paper and to the poster about this research that was presented at ECTRIMS are in the summary.