It has been one of the problems, actually, because some of the people who really don't believe in the association of CCSVI have put forth exactly this observation: Why is it that so many patients have the same abnormalities in their vein system and don't show the MS symptoms?
We could discuss at length the various reasons for that. Let's just say that right now there's enough evidence, as you know, for the possibility of an association, or an increased prevalence, for the working group to recommend to us that we go with a trial. And if we're moving on a trial, it's because we believe there are scientific reasons for it. Otherwise we'd know there would be no chance for the ethics review boards to approve such a trial. So if we launched it, it's because we feel at this point there are enough question marks of importance to really further investigate this.