Dr Hilary Jones explained on Daybreak how Mark Cahill's hand transplant was a world first.
He said hand transplants have been done since the 1960s, however this is the first time that the hand has been removed and the donor organ has been transplanted on at the same time.
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A woman who was "dragged away" by a crocodile as her friend tried in vain to rescue her is reportedly still missing in Australia.
Police say at least one gunman armed with a high-powered rifle, began "shooting randomly" resulting in the death of a man in his 50s.
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