And then for the damaged arthritis on the surface, we did a stem cell paste graft, which we designed in 1991, to regrow that articular cartilage surface and give it back a smooth surface there.

So what we're going to do is take an articular cartilage from a young, healthy pig, strip it of its antigens, load it with your stem cells, then put it back on to that arthritic surface in your knee, tack it on there, have you heal that surface and then create a new biologic surface for your knee.