that means that everyone, the doctors, the families, they all knew that the therapy was being administered. >> so these cells are not manipulated. we're just watching them and infusing them to the child. >> each child received 1 to 2 billion cells given through an i.v. at six months and then a year later the children returned for observation. >> generally we saw behaviors improve in the children at six months compared to their baseline studies. >> i wonder if it's anything else we could use. >> 70% did report behavioral improvements. but the doctor is cautious about those results. >> my role is to evaluate the children and to determine, have they actually responded to this treatment. that's actually a complicated task because autism is very variable. >> anything else you see happening in that picture?