Of course, Darren, we've been dealing with some paper performance elements in our Medicare reimbursement. Now, for the last few years, we do well with that. Of course, that's a small percentage of the overall Medicare revenue. In our managed care contracts, many of our managed care have paper performance and those contracts typically impacts the amount of the annual increase, it maybe a 0.5% or a certain amount of the increased subject to achieving certain performance metrics. And again, we perform well with those metrics. When I talk about the bigger picture, the value in healthcare, and I mentioned this in my opening comments, we realize that with changes in healthcare, increasing consumers in the healthcare that we need to provide greater quality in service and value. And so if you look at our agenda around quality, our agenda around patient service, our ability to deliver care efficiently, our facilities, the investments we're making in technology, all these things, clinical excellence, all these things I think are reflective of an organization that's focused on improving the outcomes and service to our patients and therefore providing more value for the healthcare dollar. So I feel very comfortable that we're making the right investments to be able to operate effectively in an environment where it's, say, more value-based, based on quality outcomes and delivering value to the patients or to the payers or to the employers. Today not a lot of our revenue quite frankly is subject to that. Again, it's implemental in certain contracts. But we are preparing the organization to be able to perform in that environment, if we see the marketplace change. Number one, it's good business, it's what we should be focused on, quality and service to the patients, as I said is our number one priority and it will continue to be in the foreseeable future.