text:  So another factor that both of you discussed was the other environmental factors, including potential chemical exposure and how that is hard to measure. So we spoke to someone about that because we're talking about chemicals like the PFAS chemicals. They're also called forever chemicals. They are found in a lot of goods, including some textiles, even dental floss. There's also a class of chemicals known as endocrine disruptors found in a lot of personal care products.