Sure, they are two really good questions, Kelsey. So with respect to cell expansion, of the product that we may say, and this is where again, I want to hesitate, I - we can't assume that NK cells and T-cells are going to behave the same. So some of the rules of the road that have been written for CAR T-cell therapy, I'm not necessarily sure apply to NK cells. I mean, so we're going to be cautious about making assumptions based on all the literature in the T-cell world. That said, we have disclosed that the first - that patient two, to be clear. Patient two that we're speaking about, did show PK in the blood, and showed expansion within the blood door and which peaked about day eight or nine, if I recall correctly, and then started to degrade over a period of the next 14 days. And so, interestingly enough, that's one of the things we're going to look at with respect to the second dose, how does the second dose compare in with respect to the first dose with respect to its behavior, both in terms of PK expansion, immunogenicity, and then obviously look at outcomes of the patient. So I think that's super, I think that's super interesting. With respect to the ability we want to get to a multi-dose paradigm. And I sort of articulated that that I think that's important just generally in the field. So I think quite honestly, the data that we're generating for FT500, as well as for FT516, which are both multi-dose paradigms, right off of that, can be very helpful in working with the FDA in a collaborative manner to get to a multi-dose paradigm. As you probably can appreciate right now, we do have the ability to give a second dose. We actually did do give a second dose to patient too. But we worked with the F - right now for 596, we're working with the FDA on a case-by-case basis. I do expect us in the coming months to have a conversation with the FDA, including presenting the data that we have on FT500 and FT516, to try and transition and move to a multi-dose treatment paradigm, much like we have with all our other products, including FT538 and even FT819.