I heard about this on the radio today or yesterday. If I remember correctly, the progresses would be reversed if treatments did not continue. But as long as treatments continued, progress was seen.
I also believe I heard them say that they were looking for OK to start human testing.
As long as side effects are minimal, I can't see why someone would care if treatments were ongoing.
I have a friend who has a son with MD. He's in a wheelchair now, and I was just wondering if this type of treatment, in addition to slowing the progression of the disease, might even reverse some of the effects.