 Remember, regrowing joint cartilage, it is a slow process, unfortunately. It's sort of like growing hair. If you're bald and you wanted to regrow your hair, if you could, you know, you can't do it in two weeks. It takes time. But these MRI before and afters are absolutely unbelievable because what you can see is the thickening and sharpness in the cartilage itself in the knee joint. They also did a study prior to the unit.