Donated stem cells gave children near death from tissue rejection disease a second chance, according to results Osiris Therapeutics presented to the American Society of Hematology this week.

Osiris gave its patented Prochymal therapy to 12 children whose life-sustaining bone marrow transplants had turned and attacked their own bodies. The last-ditch effort saved the lives of seven of those children, who otherwise had less than 100 days to live.