So, just to add, Ann, to Steve’s point that a lot of the benefits of the PLN type elements is still in front of us. So, it hasn’t driven the volume growth to this point, it’s an enabler to continue to drive. So, what are some of those things and it’s going to be different by payer type. But these are concepts that we’ve talked about and various payers have embraced some of these or are all of these to a certain extent. A lot of them are rooted in us getting additional payment or a bonus payment what have you as we’ve shown the ability to scale work to better value away from higher cost providers.So, we’ve gotten that in a couple of contracts recently where we have a metric in a way of showing that as they save money, as their members save money that we get a piece of that. And so, we’re aligning those incentives. Number one is around treatment of preauthorization, which is a huge driver for denial. So, and a couple of payers we’ve gotten -- as our chief competitors and some others, the lab that have shown themselves to be high quality, actually differentiate themselves positively from a service perspective and other things around panels and how conduct themselves. We’ve actually gotten the status where they wave the preauthorization. So, it's an advantage for us from a physician ordering perspective that payers, as we know, if you send the work to these, following labs that who are going to be okay with it. So, therefore, you don't require a preauth. So, that's another element that we've gotten in some of our contracts.Steve mentioned some of the zero out of pocket, and some of the payers are coming up with products that they are offering, but obviously got market. We’ll see the adoption rate and then some other payers have voiced an interest in going heavily in that kind of plan benefit design. So, again, it's not as if there's a one size fits all. That's why we talk about these being in elements in some of the other payers. And then, finally, there is a lot of interest in kind of sharing we’ll call it the win fail game from our outreach acquisition. So, when we buy hospital outreach, obviously those commercial rates immediately go to our negotiated rates, which is a huge savings for patients, huge savings for the payer and the notion that, hey, this is good for all stakeholders, and we should share some of that value.So, those are a couple of details that certainly have gotten a lot of traction with the payers. And as Steve pointed out, that is in front of us. So, when I say in front of us, we've gotten those in some of the contracts but obviously, we have to perform and we have to earn those. And then, those are upside going ahead.