Doctors in Poland, in collaboration with scientists in London, have transplanted olfactory cells from a man's nasal cavity into his spinal cord. With the support of a frame, the man is now walking again after being paralyzed from the chest down for almost two years from a knife attack in 2010. In addition to the transplant surgery, the man, Darek Fidyka, has been in an intensive exercise therapy program.
Source:
Walsh, Fergus. (2014-10-21). "Paralysed man walks again after cell transplant". BBC. Retrieved 2014-10-21.
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