Yes, I think we are. Our technology is fairly crude right now. We've gone from CAT scans, to MRIs to PET scans and SPECT scans. One thing we looked at in the study at the VA was some of the more sensitive ways of looking at things. They're sensitive, but we don't necessarily know what the answer is. Most of the research that has been done in the past has been done by cutting up rats, staining their brains and looking at them. We haven't done that yet.
I think the further we go down this field, the more we are going to find the anatomical lesions, whether we can just look and see the vacuoles—like we can in the rat brains—or whether they're smaller and harder to tease out.
I believe we will find damage.
I'm going to turn to Dr. Nevin because I have a feeling he will want to jump in here.