So, we haven't talked about the specific repeat numbers when we said it's very strong. We see strong repeat business. And we've also -- I can also say that the trend that we've seen is that the second contracts are higher value than the first contracts that are done, which is all of these trends are in our favor, had a very strong response. I think that's driven by a few things. I think it's driven by the fact that we’re hitting a key need for the customers that they grow to understand the value of the offering after they’ve used it a little bit. And then it also speaks to the increasing level of validation. So as we work with these customers, some of what they're doing is, for example, testing internal compounds that had failures for them. So, we've talked to you about compounds known to the space that were late stage failures that we were able to detect that couldn't have been detected, were not detected with, for example, rat and traditional 2D cell culture tox models. But internal to each customer, each company, especially large pharma companies, they have misses that aren't known to the world that they want to test with us, and a number of them have undertaken the test dose. And we feel we’re doing very strongly with them in terms of that kind of testing which we seem to greater confidence in our platforms. So that's all been very positive. And I think, if anything, the anticipation and excitement about the kidney platform, it's even higher than it was at liver launch, in part, because as we've said before, there's a stronger unmet need there. They don't have an in-vitro model that they can use. And the data that we're showing, it's still early, but the data is very powerful. And I think there's a strong response to that; so, a lot of interest. And so, yes, some of the existing customers are obviously interested in using that, but we're getting new customers as well, who have a first use for that. So it's exciting across the board in the kidney space.