"Now that the FDA's policies are clear, will it back them up with action?" said Knoepfler of the University of California, Davis. "Does it have the resources?"
"It's sort of this 21st century cutting-edge technology. But the way it's being implemented at these clinics and how it's regulated is more like the 19th century. It's a Wild West," says Dr. Paul Knoepfler, a stem cell researcher at the University of California at Davis.