There's no known cure for autism, but a new centre in Toronto says it's getting positive results from oxygen therapy. While critics say the treatments are costly and unproven, the Ontario Hyperbaric Oxygen Therapy Centre says it's having great success treating children with this unconventional technique.

The treatments see children slide into a hyperbaric oxygen chamber, where they breathe in oxygen for several hours. Parents say the technique is making a difference as their children become more responsive and more social.

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