I agree Sarah.... These experts didn't explain why Zamboni's procedure shouldn't work but just pin-point the study weaknesses from a statistical (method) point of view.
My personal opinion is that even though a malformed vein going/coming from the brain is not the cause of MS it will most probably eliminate many symptoms and personally I wouldn't want one.
These MS experts reveal their bias when they say that enlarging veins may not be safe, when every cardiologist can confirm that is performed even in small hospitals every day several times.
As we know the economic interest behind MS is huge and it will take time to see the truth.