 So I think there's two problems here when it comes to this blinding component. The first is that the psychotherapy component and the MDMA component are sort of mixed together in a complex way. Sarah described that there was these three sessions and you had psychotherapy in between. And so this is really entangled. And MAPS has actually never been really clear what the mechanisms are, what the proposed mechanisms are. Is MDMA supporting psychotherapy? Is psychotherapy supporting MDMA? So you'd need to be able to disentangle this properly in a way.