But to say that one thing can cause another – like, exposure to PFOA can cause kidney cancer – doctors usually want to see a randomized clinical trial. [MUSIC IN]Hoplamazian, narrating: I’ve heard this kind of thing from a lot of people in Merrimack. Jen says it just felt like the neighborly thing to do. I think, like, even though we're all dealing with the same thing – most of us, again, like, it's not everybody. Hoplamazian, narrating: There’s another thing making the Peirces feel even more uncertain about where this is all going.