21 October 2014 Last updated at 09:42 BST Pioneering therapy that enabled a paralysed man to walk again has "opened the door" to future treatment with vast potential, the leader of the UK research team Prof Geoff Raisman has said. Darek Fidyka, who was paralysed from the chest down in a knife attack in 2010, can now walk using a frame after an operation involving cells from his nasal cavity...
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