People with long-term back problems find relief. These are people who have had pain sometimes greater than five or ten years, and the pain relief typically begins within two to three weeks after the procedure, but very often patients do feel relief the next day. We've had many patients who have called and said I haven't used a pain medicine since the procedure. We don't expect that, but we see that very often. People who have avoided surgery get help.
Many people have back pain.
And the most common cause for low back pain is a bulged disc. It's a disc that has tears in it. And historically, the people didn't want to have it treated, and appropriately so, because the treatment was very severe. The surgical intervention was a big deal. It's really, truly changed the world of treating back pain.