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Most CTE sufferers have been found at autopsy to have tau, but also about 40 % have had amyloid as well. So they are showing both degeneration markers in the brain, most importantly, it's a distinct pattern that we haven't seen in any other condition -- not in Alzheimer's, not in other forms of dementia, and certainly not in normal controls. So it's not just what we're binding to, it's that this pattern appears to be distinct and it appears to be the areas that have been damaged in autopsy studies of sufferers with CTE.