 Well, there are estimates that at least 40% of cases are preventable according to the latest Lancet Commission on Dementia. But I believe that the vast majority of Alzheimer's cases are and possibly even Parkinson's disease cases are. For a layman like me, could you tell me the difference between dementia and Alzheimer's? Yeah, well, Alzheimer's is the most common form of dementia. So Alzheimer's disease affects about 6 million people, a little bit more than that in the U.S. And numbers are expected to explode in the coming years. But there are other forms of dementia. There's Lewy body dementia.