what is a control arm and an experimental arm?

[Music] So the control arm is what's considered a standard of care therapy, what you would normally get if you weren't on a trial. So what you would normally get, that's the control arm, the experimental arm is whatever you're doing different than that, whether it's whether it's adding a new drug to it, using a totally different drug regimen. That's the experimental arm. One of the problems with randomized clinical trials is that there is a standard of care with all the progress that we've made with myeloma. It's very possible, possible that the experimental arm is going to be better, but that's not always the case, which is why we have to run these randomized clinical trials. [Music]