There have been no complications to treatment.
I'll give you a really nice example. A 23-year-old kid can't feel his left arm or left leg. He gets an angioplasty done and he gets feeling back in his left leg and his left arm. He's living in a house with an elevator because he can't go up and down the stairs. A week later he tells his mom and dad he's moving out of the house and into the apartment with his girlfriend because he doesn't have MS any more.
The procedure works. We have to allow patients to have the procedure.