Yes. Good morning, Tazeen. There's a lot of – well, there's a couple of things that are driving our processes as we understand how the hospitals view the opioid epidemic. The answer to your question is, yes, it is evolving. It's evolving in some cases because of work that's been done in these major academic centers and where we see high doses of opioid causing real issues in patient care. And I'll just focus for a second, given the nature of your question, on GYN oncology. So the issue that the clinicians face is that if you are forced to down-regulate the immune system with large doses of opioids, then they have a problem in instituting a oncology therapeutic regimen because of the down regulation of the immune system. And so that's why the medical community in many ways is focused on, can I find a way to keep the immune system intact for these gals so that I can immediately start my oncology therapeutic post surgery. And, if you focus then on Mayo, their initial work was in mastectomy where they found that you could significantly reduce the amount of opioid that was required and reduce both opioid requirement and length of stay. And then, the Sean Dowdy discussion that we talked about earlier is sort of bringing a progressive approach. First, they were able to significantly reduce opioids in ovarian cancer but their focus then became how do we get patients off of the PCA machines and the self-administration of opioids. And, in their last publication, they were able to show that they reduced the use of PCA machines from something in the 30% range to 4%, so that these patients now are being managed in a way that doesn't require opioids and he has now reduced his opioid load by over 90%. The trial that Dr. Ramirez is instituting at MD Anderson, the primary endpoint of that trial is actually opioid-free. And so we're not talking about opioid reductions anymore, we're talking about exploring the opportunity to treat patients with no opioids in certain situations where we believe opioids are most detrimental. So that's the way we're sort of following the market, if you will, and going where the clinicians are telling us opioids are most problematic. And so that is a bit of a change. In joints, it was really driven by economics. As you get into mastectomy and abdominal wall and breast reconstruction and ovarian cancer, it's really driven by patient care, which is why the ERAS (52:46) are moving quickly in that direction. Same for colorectal, by the way. Right. If you take out a piece of somebody's bowel, the last thing you want to tell that patient is you use the drug for pain control that causes nausea, vomiting, urinary retention, and constipation., right? That doesn't make a heck of a lot of sense.