They might by accident give away some type of information. So to avoid that type of thing happening, you would have a, you could do a double blind. And there's even, some people talk about a triple blind experiment where even the people analyzing the data don't know which group was the control group and which group was the treatment group. And once again, that's another way to avoid bias. So now that we've kind of figured out, we have a control group, we have a treatment group, we're using A1c as our response variable. So we would want to measure folks A1c levels, their hemoglobin A1c levels before they get either the placebo or the medicine. And then maybe after three months, we would measure their A1c after.