Well, yes, let me make a couple of comments just contextually. I mean, one is we work to maintain our USPI margins based upon longer term business decisions we make around service lines that we choose to be in, what we think the mix will be with the physicians that we work with, et cetera. But make no mistake about it, there are many things that we could do to grow the business within that range that may move the margins up or sometimes down a bit, but they're still highly accretive to the business, given the types of post-synergy multiples that we deliver. So, I just want to provide that backdrop because we focus on a range that we want to be in for the ROIs that we want to have. Now, specifically to your question around service lines, remember, the government mix in different service lines can be different. And obviously, the government mix will have a lower margin. That doesn't necessarily mean that avoiding the service lines that have a little bit more government mix, like for example, joint replacements or other orthopedic-type procedures is the right answer because they add net revenue intensity. But when those service lines scale up to their full potential, they meet USPI's margins, right? So, when you're scaling up a new service line and you're running at subscale in 60, 70 centers as you introduce ortho into those centers, of course, the margins will be lower until you get them up to scale. And you're finally correct to point out that as we increase the number of de novos, obviously, those are operating expenses that are, in our environment, not contributing to the revenue and margin profile of existing centers. And as we've moved from having a handful three or four de novos to 30, we are obviously cognizant of the fact that we need to overcome those operating expenses to maintain the margins that we've outlined in our range. And the good news is we're doing that. We don't talk about it much because it has not been an issue.