A handful of the treated animals died.

One of the corners of the enclosure is chosen mainly to keep visitors away from the treated animals.

The treated animals, he said, started to flex their legs.

A year after the surgery, the treated animals could partly support their weight and could move their legs, although they were not walking normally.

On the molecular level, brain chemistry of the treated animals was also restored to normal.

Treatment may begin only at mid-life, and the average lifespan of the 10% longest living treated animals is used for the record.

Some contraindications have been noted in treated animals taking certain other drugs.

Healing was almost complete on 21st day of fracture in the treated animals and remained incomplete in the control animals.

Comparing the health of control animals with the health of treated animals allows researchers to evaluate the effects of a treatment more accurately.