All right. So, I’ll kick it off with the Alzheimer’s answer and turn it over to Paul. First, on serology, blood-based biomarkers, I think they’re very important. And I think if you look at the prostate market, you have PSA as a legitimate marker for detection, follow-up, et cetera, for disease. And I would think in AD or Alzheimer’s disease, you’d see a similar pattern, hopefully, where people will get screened with serology and then become candidates for a PET scan or molecular imaging. I think when you compare them, there is no comparison, right? Molecular imaging gives you quantification, it gives you geography, it gives you correlation to treatment outcome and effect, so none of the serology markers can actually do that, they’re not that sensitive, nor are they specific. So if you’re looking at specific regions of the brain, for example with MK-6240, and looking at longitudinal follow-up, you’re looking at what parts of the brain are mostly affected by the NFTs, serology can never do that, at least in my current lifetime, I think. So while I appreciate comments from others, I think maybe they’re not totally informed, but there’s still comparison with molecular imaging and serology. I think serology is a great tool, it’s cost-effective, it should be used as a screening mechanism, but if you want to know what’s happening inside the brain with Alzheimer’s dementia, add geography, follow-up, effects of treatment, you really need a molecular imaging scan with beta amyloid and tau.