 So if someone needs it, then why wouldn't they get a replacement surgery? Go ahead and get it now. Yeah, while they're young and they can recover, right? Yeah, and that's a valid viewpoint, right? And I think a lot of people are led to think that way. But they all have a life expectancy, and the standard is about 10 years. You have a knee replaced, you're probably going to, in 10 years, going to need another one, maybe 15. Depends on how well you treat the thing.