So if you just actually relied on this data, it looks like ERB2 is actually, to some degree, even worse than the, oh, no, no, I take that back. It's not worse, because you would have expected a small number, and a lot of people got sick here. So this is the placebo. Well, anyway, we don't want to make judgments just staring at the numbers. Let's figure out our chi-squared statistic. And to do that, let's get our statistic, our chi-squared statistic. I'll write it like this, maybe for fun.